142 NORTH AMERICAN ORMOSIA (DIPTERA) 



Abdomen fuscous, clothed with rather long pale pubescence. Hypopygium 

 ferruginous, the ninth sternite paler, strongly prolonged and deeply incised, 

 each side somewhat dilated and infuscate distad. 



9 , Does not differ from the male, except that the antennae are a trifle 

 shorter. Ovipositor yellowish-red, upper valves slightly curved. 



Holotype: d 1 ; Sonoma Co., California. April 8, 1914. (Au- 

 gust Kusche— collector.) 



Allotype: 9 ; topotypic. May 13, 1914. 



Paratypes: 2 females; topotypic. May 13, 1914. 



In its unicolorous wings, the discal cell opening into the third 

 posterior cell and veins six and seven diverging towards the wing 

 margin, the present species approaches closest to 0. manicata 

 Doane and differs from it in its more yellow color, the region of 

 the stigma not darker and the pale pubescence of the abdomen, 

 as well as differences in the construction of the hypopygium. 

 From 0. deviata, it differs in the pale basal joints of the antennae. 

 Four specimens in author's collection. 



Ormosia bilineata sp. n. (PL X, fig. 8.) 



Brown, antennae entirely fuscous, wings unicolorous, discal cell opening into 

 the third posterior cell, vein six and seven diverging to wing margin ; mesono- 

 tum with a blackish fine each side. 



6% Length, 3.25 mm.; wing, 5 mm. 



Head fuscous, front with a grayish bloom, palpi dark fuscous, antennae fus- 

 cous, bent back they reach to the insertion of the wings, two basal joints stout, 

 basal joints of flagellum nearly equal in thickness to the former, outer joints 

 gradually decreasing in thickness and clothed with a dense pubescence, the 

 length of which is nearly equal to the length of the respective joints, each joint 

 bearing one or more setae. Eyes widely separated above. 



Thorax above and pleura with a fine, grayish bloom; mesonotum with a nar- 

 row, blackish line on each side and bearing a row of fine, pale hairs ; these fines 

 do not reach the transverse suture, but behind the latter there is an oblique 

 blackish line each side; some scattered hairs on scutellum and metanotum. 

 Legs slender, yellowish-brown, coxae and femora towards the base, yellowish. 

 Halteres entirely pale yellow. Wings moderately wide, nearly hyaline with 

 a faint brownish tinge and a pearly lustre, pubescence fine, not dense and rather 

 short; stigma, or rather the entire second marginal cell, infuscate; the discal 

 cell opens into the third posterior cell, great cross vein at base of discal cell, 

 veins six and seven diverging to the wing margin, veins brown. 



Abdomen reddish-brown, sparsely clothed with whitish hairs. Hypopygium 

 short, ferruginous with long yellow hairs, pleural lobes short, appendages 

 small, blackish, the ninth sternite prolonged into a narrowed, flattened process, 

 slightly widened distad and projecting somewhat beyond the lobes. 



9, Length, 3.5 mm.; wing, 5 mm. 



