NATURAL SCIENCES OF PHILADELPHIA. 133 



9 . Larger and more robust ; antennoe not serrate, slightly 

 thickened toward apex ; face black, with a short white line on 

 each side ; otherwise like the % . 



Orizaba. Resembles inclyta in form and sculpture, but very 

 ditferent in ornamentation. The anterior win^s have a broad 

 blackish medial band, and the apex is broadly blackish, while in- 

 clyta lias only the apex blackish. 



3. Trogus inclyta. 



Joppa iiidi/tu, Cress., Trans. Am. Ent. Soc, ii. p. 29, J. 



Cordova. 



Genus CRYPTUS, Fabr. 



Wings hyaline. 

 Body black and -^viiite. 

 Mcsothorax with two short -white discal hues. 



Large, robust ; length 7 lines, 9 1. aztecus. 



Small, slender ; length 3 lines, % 2. tantilliis. 



Mesotliorax with central white spot. 



3Ietatliorax black above, inclosing four white spots ; base of second 



abdominal segment black 3. tenuiventris. 



Metathorax black at base, with a central black stripe ; base of second 



abdominal segment white 4. Celaya. 



Metathorax with an arcuate black band and a black spot at tip. 



5. arcuatus. 

 Metathorax with only a narrow, median, black band. 



G. transversus. 

 Mesotliorax with a central white stripe ; metathorax witli a transverse 



angular black mark near base 7. angulatus. 



Body pale ferruginous ; head, antennae, and mesotliorax black and 



Avhitc ; mesotliorax with a central white dot 8. citus. 



Wings ftisciate with dusky ; body pale honey -yellow. . . 9. pulchripennis. 

 Wings fuscous, subfasciate with yellowish ; body ferruginous. 



10. xanthostigma. 



1. Cryptus aztecus, n. sp. 



9 . Black ; face, orbits broad on the cheeks, palpi, broad com- 

 plete annulus on antenna? above middle, anterior margin of pro- 

 thorax, a triangular spot on each side posteriorly before the 

 tegulix?, two abbreviated lines on disk of mcsothorax, teguloe, a 

 short line beneath, a large elongate oblique mark on each side of 

 pleura, with a small spot above it and with its lower })osterior 

 end indented with black, the scutellura and post-scutcllum, a 

 transverse spot behind posterior wing, four large spots on meta- 



