NORTH AMKRICAN DIPTKRA. 177 



SI. — Anal, or at least the axillary cell partly hyaline 83. 



Anal and axillary cells wholly brown ; no pure hyaline spot in base of the 



marginal nor of the second basal cell 82. 



82. — Discal cell wholly brown; claws of front tarsi minute 88. 



Discal cell hyaline at the apex ; claws of front tarsi well developed. 



54. seleue. 

 83. — Veins at bases of the first and fourth posterior cells bordered with suhhya- 



line S4 



Veins at bases of first and fourth posterior cells never bordered with sub- 

 hyaline 86. 



84.— Brown of wings does not enclose a hyaline spot at base of second subraar- 



ginal cell 85. 



Brown of wings encloses a hyaline spot at base of second submarginal cell ; 

 sides of third abdominal segment furnished with black pile. 



44. pertusa. 

 85. — Sides of third abdominal segment destitute of black pile. ...43. niigator. 

 Sides of third abdominal segment furnished with black pile. 



72. fenestratoi<le$<i. 



86. — Venter partly or wholly reddish (57_ 



Venter wholly black; pile of sides of abdomen prevailingly whitish. 



46. tegmiiiipeiinis-isackeuii. 

 87.— Wings with blackish clouds on veins at bases of first, third and fourth pos- 

 terior cells 73. sabulosa. 



Wings destitute of blackish clouds 1. juiictiira. 



88.— Apex of wings wholly brown, but little lighter than the basal part 89. 



Apex of wings hyaline or grayish, noticeably lighter than the basal part..90. 

 89. — Posterior margin of abdominal segments black tomentose ; legs largely 



^ilaPk 47. lucifer. 



Posterior margins of abdominal segments destitute of black tomentum ; 



legs reddish 46. tegiuinipeiiiiJM. 



90. — Brown of wings blackish; the apex pure hyaline 24. iiiiseolla. 



Brown of wings yellowish ; the apex smoky 48. alplia-f'iili<;iiio»)a. 



Notes and Descriptions. 



1. Antlira.'K jiiiictura Coq. 



Tlie thirteen specinieus upon which I founded this species were 

 captured in Orange County, California, and each of them, with a 

 single exception, has three submarginal cells in each wino-, the ex- 

 ception noted having four of these cells in one wing and five in the 

 other, formed by adventitious cro,ss-veins in the third submarginal 

 cell. The past season I collected three specimens in Los Ano-eles 

 County and five in San Diego County, agreeing in every respect 

 with the above, except in possessing only two submarginal cells in 

 each wing; otherwise I am unable to discover the slightest difference 

 between these two forms, and I do not hesitate to pronounce them 



TRANS. AM. ENT. SOC. XIX. (23) JUl.Y, 1S92. 



