WILLIAM G. DIETZ HI 



42. Occiput entirelj- shining 43 



Occiput opaque with a shining triangular spot 46 



43. Cord clouded unifasciata Loew 



Cord not clouded 44 



44. Front and occiput unicolorous 4.5 



Front and occiput with a black strijje occipitalis Loew 



45. Head yellow; thoracic stripes well defined sodalis Loew 



Head dark ferruginous; thoracic stripes ill-defined. 



sodalis nictans subsp. n. 



46. Ends of thoracic suture black 47 



Not as in the alternative 50 



47. Cells C and Sc fuscous, stigma very slightly infuscate. 



costomarg^nata spec. n. 

 These cells pale, stigma yellowish-fuscous 48 



48. Abdominal tergites conspicuously marked with dark fuscous or blackish; 



the eighth sternite not deeply emarginate 49 



Markings inconspicuous or obsolete; the eighth sternite deeply emarginate. 



occidentalis Doane 



49. Abdomen with dorsal row of blotches or spots; the inner apical ap])endage 



not prolonged into a slender process ferruginea Fabricius 



Latero-posterior margins of abdominal tergites black; the inner apical 

 appendage prolonged into a slender, style-like ])rocess; a l)lack 

 dot above each eye beutenmuelleri spec. n. 



50. Stigma brownish-yellow occipitalis Doane'-" 



Stigma blackish- brown gracilicomis Loew 



51. Flagellar joints black at the base 52 



Flagellar joints yellow at the base 58 



52. Occiput sliining 53 



Occiput opaque with defined shining triangle 56 



53. Outer portion of transverse suture not tinged with black; thoracic stripes 



ill-defined 54 



Not as in the alternative 55 



54. Yellow; abdomen with lateral rows of black spots. . xanthostigma Loew 

 Ferruginous; abdomen with lateral stripes and segments posteriorly, 



banded with black cingulata spec. n. 



55. Al)domen with dorsal and lateral rows of l)lack spots; wings pulicscent. 



obliterata spec. n. 

 Abdomen with lateral .stripes and segments banded p(jsleri()rly with black. 



wyalusingensis spec. n. 



56. Cells C and Schyaline 57 



These cells colored; stigma yellowish-brown suturalis Loew 



57. Stigma subfuscous; abdomen with three rows of tjlack .spots. 



abbreviata Loew 



Stigma almost hyaline; abdominal tergites two to five with two i)ale, 



fuscous lines; thoracic stripes l)road lativittata spec. n. 



20 1 here follow Prof. Doane; the occiput varies from sliining to subopatiue. 



TRANS. AM. ENT. SOC, XLIV. 



