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Anastrepha ocresia (Walker)

Recognition
Anastrepha ocresia is one of the species of the serpentina group with a hyaline area in cell br posterior to the pterostigma that is not extended to vein R4+5. It differs from all other species of the serpentina group in having the brown markings of the mesonotum restricted to the areas near the scuto-scutellar suture, and the scutum without microtrichia except on the extreme lateral margin. The broad distal section of the S-band (at apex of vein R2+3 greater than 0.70 times width of cell r2+3) differentiates it from all other species except A. ornata. The distal arm of the V-band is always partially present, at least from vein M to the posterior wing margin. Anastrepha ocresia is the only species of the serpentina group known from the Greater Antilles and Florida.

Description
Body largely orange to red-brown with yellow and dark brown markings. Setae dark brown.

Head: Yellow except ocellar tubercle brown. Facial carina, in profile, concave. 3-5, usually 4, frontal setae; 1-2 orbital setae, posterior seta absent on at least one side in 9 of 25 specimens, but well developed if present. Ocellar seta weak, short to minute. Antenna extended 0.70-0.85 distance to lower facial margin.

Dorsal head, thorax and abdomen, female.

Thorax: Mostly orange with following areas yellow and usually distinctly contrasting: postpronotal lobe; single medial and paired sublateral vittae on scutum, the medial vitta extended nearly full length of scutum, anterior 3/4 very slender, broadened posteriorly, but extended laterally only to or slightly beyond level of acrostichal seta; sublateral vitta extended from transverse suture to posterior margin, including intra-alar seta; scutellum except base (brown area well separated from basal seta or sometimes diffusely extended to it or slightly beyond); dorsal margin and anteroventral corner of anepisternum; dorsal half to 2/3 of greater ampulla; katepimeron; and most of anatergite and katatergite. Mesonotum mostly to entirely orange, usually with dark brown spot or band bordering scuto-scutellar suture, sometimes shaped like shallow U, the arms extended anteriorly no more than to level of intra-alar seta. Darker areas of anepisternum, katepisternum, and anepimeron orange; those of meron and katatergite sometimes dark brown. Subscutellum and mediotergite usually dark brown, narrowly orange medially, but occasionally mostly orange with dark brown lateral margins. Mesonotum 2.50-3.45 mm long. Scutum without microtrichia except postsutural lateral margin (lateral to supra-alar seta); presutural setulae mostly yellow, brown on narrow area along dorsocentral line, postsutural setulae yellow medially, mostly brown lateral to level of acrostichal seta. Katepisternal seta usually slightly longer than postocellar seta, usually moderately developed but occasionally weak, red-brown or occasionally yellowish.

Wing: Length 5.27-7.49 mm. Vein M strongly curved apically; section between BM-Cu and R-M 1.85-2.33 times as long as section between R-M and DM-Cu; section between R-M and DM-Cu 0.80-0.96 times as long as DM-Cu. Crossvein DM-Cu oblique, with anterior end more distal than posterior end. Pattern mostly moderate to dark brown. C-band and S-band narrowly to broadly connected in cell br and sometimes r2+3, separated basally by hyaline area in cell br aligned with pterostigma, hyaline basal 1/4-1/3 of cell dm, and hyaline to yellowish area covering all of cell bm. C-band yellowish or subhyaline in cells bc and cell c, except anterior margin; with large yellowish area in base of cell sc and cells r1 and r2+3 posterior to pterostigma, extending distally at least to apical 2/3 of pterostigma, sometimes reaching level of apex of vein R1. S-band with narrow yellow area in cell dm; most of cell bcu yellowish to subhyaline; rest of band brown, including areas distal to and anterior to R-M; distal section broad, at apex of vein R2+3 0.73-1.00 times width of cell r2+3; extended to or occasionally almost to apex of vein M. Hyaline spot in cell r1 usually nearly triangular, sometimes rounded, usually extended into cell r2+3 and often to vein R4+5; its apex aligned slightly to distinctly basal to R-M. V-band with distal arm usually reduced, extended anteriorly beyond vein M, but only rarely reaching vein R4+5 (one female from Dominican Republic); separated from proximal arm or sometimes connected along vein M (if connected, never with hyaline space between band and vein M); proximal arm usually extended to vein R4+5, occasionally connected to S-band along vein R4+5; extended basally along posterior wing margin often almost to vein A1+Cu2 but not connected to extension from base of S-band.

Wing.

Abdomen: Orange with yellow and brown markings. Syntergite 1+2 and tergites 3-4 with narrow brown bands, narrowly medially interrupted occasionally on tergite 3, often on tergite 4; posterior margin yellow. Tergite 5 and female tergite 6 orange.

Male terminalia: Dorsal posterior margin of epandrium evenly convex. Lateral surstylus moderately long; in lateral view slightly curved; in posterior view with strong basolateral lobe, main part narrowly triangular, acute apically. Proctiger with lateral fold separating sclerotized areas. Phallus 3.54-4.51 mm long; 1.27-1.60 times as long as mesonotum. Glans 0.50 mm long; acrophallus relatively stout.

Epandrium and surstyli, lateral and posterior.

Female terminalia: Oviscape 2.95-4.00 mm long, 0.95-1.32 times as long as mesonotum. Eversible membrane with 25-40 large, hook-like dorsobasal scales in triangular pattern. Aculeus 2.83-4.08 mm long; tip 0.30-0.36 mm long, 0.11-0.13 mm wide, very gradually tapered basally, apical 0.53-0.67 finely serrate, triangular. Spermathecae ovoid.

Aculeus tip, ventral.