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Key to the species of Cryptodacus

The following key is copied from Norrbom (1994).

1. Frons brown only between ocelli. Face entirely yellow. Scutum without white band along transverse suture and without lateral white stripe or spot at intra-alar seta (Fig. 2D). Discal band not extended across DM-Cu (Fig. 1B). Orbital ratio (distance between orbital setae/ distance from anterior seta to eye margin) < 1. Bolivia, Peru. . . . . . . . . . . . . obliquus Hendel

- Frons with brown mark extended beyond ocelli (Fig. 2A-B). Face with brown spot or spots. Scutum with white band on transverse suture and with lateral white stripe (Fig. 2E) or at least a spot at intra-alar seta (Fig. 2C). Discal band extended across posterior end or more of DM-Cu (Fig. 1A,C-G). Orbital ratio (distance between orbital setae/ distance from anterior seta to eye margin) > 1 (Fig. 2A-B). . . . . . . . . . . . 2

2. Tergite 5 (and female tergite 6) with sublateral white areas bordering medial brown stripe or stripes. DM-Cu entirely covered by discal or subapical band (Fig. 1A,F). Postgena entirely yellow. Mexico, Guatemala. . . . . . . . . . . . . . 3

- Tergite 5 (and female tergite 6) without sublateral white areas. DM-Cu not bordered by brown medially (Fig. 1C-E), except in tigreroi (Fig. 1G). Postgena entirely yellow (quirozi) or brown except anterior margin. Mexico to southern Brazil. . . . . . . . . . . . 4

3. Discal band extended across only posterior end of DM-Cu (Fig. 1A). Length of vein M from BM-Cu to R-M/ length from BM-Cu to DM-Cu < 0.75. Face with single, medial brown spot. Gena without brown spot. Syntergite 1+2 and tergite 3 each brown with narrow white apical band. Female tergites 5-6 with undivided medial brown stripe. Oviscape brown. Guatemala. . . . . . . . . . . . . . . . lopezi Norrbom

- Discal band extended across all of DM-Cu (Fig. 1F). Length of vein M from BM-Cu to R-M/ length from BM-Cu to DM-Cu > 0.80. Face with pair of sublateral brown spots. Gena with brown spot. Synergite1+2 yellow with white apical band. Tergite 3 white basally, brown apically. Female tergites 5-6 with 2 narrowly separated medial brown stripes. Oviscape orange. Mexico, Guatemala. . . . . . . . tau (Foote)

4. Cell dm with only apical corner hyaline (Fig. 1C). Tergites 3-4 each with apical white band. Scutum with white spot at base of intra-alar seta, not extended anteriorly to level of psut spal (Fig. 2C). Face with 2 or 4 brown spots, each side with large dorsal and small ventral spot (Fig. 2B) or 1 elongate spot. Frons with distinct brown stripe extended anteriorly from mark on ocelli (Fig. 2B). Colombia, northern Brazil. . . . . . . . . . ornatus Norrbom

- Cell dm with basal and apical hyaline areas (Fig. 1D,E,G). Tergites 3-4 without apical white bands. Scutum with lateral white stripe extended anteriorly to at least level of psut spal, except in quirozi. Face with 3-4 brown spots, sometimes fused into 1 U-shaped mark. Frons sometimes with irregular brownish areas (Fig. 2A), but without distinct brown stripe extended anteriorly from mark on ocelli. . . . . . . . 5

5. Postgena brown except anterior margin. Scutum with lateral white stripe extended anteriorly to at least postsutural supra-alar seta. Postpronotal lobe with at least small white spot (possibly variable in parkeri). . . . . . . . . . 6

- Postgena entirely yellow. Scutum with white spot posterior to intra-alar seta, not extended anteriorly to level of postsutural supra-alar seta (similar to Fig. 2E). Postpronotal lobe entirely brown. Mexico. . . . . . . . . quirozi Norrbom

6. Subapical band (Fig. 1G) connected to discal band posteriorly, covering all of crossvein DM-Cu. First flagellomere length/width (lateral view) > 6. Tergites 3-4 with uninterrupted medial white stripe. Aculeus tip (Fig. 5C,I) stout, serrate part slightly wider than long but narrower than aculeus width at apices of 8th sternites. Ecuador. . . . . . . . . . . . tigreroi Norrbom

- Subapical band (Fig. 1D) not connected to discal band, middle part of DM-Cu not bordered by brown. First flagellomere length/width (lateral view) < 5.5. Tergites 3-4 with or without uninterrupted medial white stripe. Aculeus tip (Fig. 5B) slender basally, serrate part as long as wide and broader than aculeus width at apices of 8th sternites (female unknown in parkeri). . . . . . . . 7

7. Face with 2 ventral and 2 dorsal brown spots. Abdomen with medial white stripe interrupted on tergites 3-4. Costa Rica. . . . . . . . . . . . . parkeri Norrbom

- Face with 1 ventral and 2 dorsal brown spots, sometimes fused into large U-shaped mark (Fig. 2A). Tergites 3-4 with uninterrupted medial white stripe. Southern Brazil. . . . . . . . . . . . . silvai Lima