W. G. DIETZ 145 



entire organ equals at least the length of the body. In appear- 

 ance this species resembles most nearly 0. monticola Osten 

 Sacken, but is at once distinguished from it, and all others with 

 greatly elongated antennae in the male, by veins six and seven 

 being widely divergent and also by the greater width of the wings. 



Ormosia taeniocera sp. n. (PL X, fig. 11.) 



Fuscous, antennae of male, approximately the length of the body, joints of 

 flagellum of nearly equal thickness throughout; discal ceU coalescing with 

 the third posterior cell, veins six and seven subparaUel, stigma distinct. 



cf, Length, 3 mm.; wing, 4.5 mm. 



Head, palpi and antennae dark fuscous; antennae about as long as the body, 

 the two basal joints rather short and thick, flagellum densely pubescent, no 

 setae, segments of nearly equal thickness, very little narrowed at each end. 

 Eyes large, closely approximate above. 



Thorax dark fuscous; collare pale yellow on each side; mesonotum with a 

 grayish bloom, without stripes, some scattered pale hairs. Halteres sordid 

 white, knob partially fuscous. Legs fuscous, coxae light brown, tarsi dark 

 brown, the latter and tibiae clothed with short hair. Wings with a brownish 

 tinge, pubescense dense and rather long, the discal cell coalescing with the 

 third posterior cell; veins six and seven subparaUel, the large cross vein at base 

 of discal cell; stigma distinct. 



Abdomen fuscous, with pale, long pile. Hypopygium concolorous, some- 

 what shining, hairy, pleurites short, appendages short, curved, the ninth 

 sternite prolonged into a spatulate process. 



Holotype: cf ; Sonoma Co., California. February, 1915 (Au 

 gust Kusche — collector.) 



A single specimen, the type, in the author's collection. From 

 the other species of Ormosia with greatly elongate antennae in 

 the male, the present species is distinguished by the segments of 

 the antennal flagellum not being attenuated apically. In the 

 prolongation of the ninth sternite in the male, it resembles 0. 

 modica and bilineata. 



TRANS. AM. ENT. SOC, XLII. 



