214 EDWARD NORTON. 



52. STRONGYLOGASTER. Dalilb. 

 Strongi/Iogastcr, Dahlb., Consp. Tenth, LS35. 

 Ilartig, Die Elattw. 



Winris as iu Taxoiius ; with or without obUque cross-line; under 

 wings with two inner cells; under wings of males often with either 

 one or no middle cells. 



Antennse. 9-articulate, not longer than to abdomen, filiform. 



FTead globular, punctured like the thorax ; clypeus notched ; labrum 

 small, roundish ; mandibles shoi't and thick, with two inner teeth ; the 

 inner labrum generally somewhat horny, rounded, hairless; the second 

 joint of palpi wanting or smaller, third constricted. 



Ahdnmcn generally lengthened, cylindrical. 



Tahle to assist in findimj the spccirs. 

 Tribe 1. — Lanceolate cell ^yith oblique cross-line; under wing of 9 with two in- 

 ner cells, of '^ . none : 



A. Under wings with incomplete outer cells : 



a. Antennse at apex white : 



Head testaceous. Two lobes of mesothorax black 1. terminalis- 



Head testaceous. Three lobes of mesothorax black 2. mellosus. 



Head black; orbits partly white 3. pallidicornis. 



Head black. Thorax black, scutellum pale 4. apicalis. 



b. Antennse at base pale 5. epicera. 



c. Antennse wholly black; 



Thorax black fi. rufocinctus. 



Thorax black, the anterior lobe and pleura rufous 7. pallipes. 



B. Tinder wings with complete outer cells : 



Head black 8. pinguis. 



Tribe 2. ^Lanceolate cell without cross-line; under wings with two inner cells : 

 Species from Noi'th Avierica. 

 Head and therax black; 



Abdomen rufous 9. tacitus. 



Abdomen rufous; base of autennfe pale 10. rufescens. 



Abdomen long, rufous, base black 11. longulus. 



Abdomen with a dark band at base of each segment 12. distans. 



13. annulosus. 



Abdomen with a pale band at base of each segment 14. multicinctns. 



Head black; thorax and abdomen mostly reddish-yellow. ..15. unicus. 

 Species from Mexico. 



Testaceous; abdomen with a double row of black dots : 



Antennse pale at base 16. meritorius. 



Antennse black 17. nigritorius. 



Black; thorax spotted; abdomen banded with white; 



pleura pale 18. illuminatus. 



Black; a yellow stripe on middle of abdomen 19. fulviventris. 



Black; a yellow stripe across pleura 20. lineatus. 



Black; mouth, collar, and bands on legs white 21. nigricans. 



Wholly black; legs pale before 22. nigredo. 



