232 CALIFORNIA ACADEMY OP SCIENCES [P»oc. 4th Sei. 



of legs reddish; femora white pilose, which is long below; four anterior 

 tibiae with white pile and long white hairs ; all tarsi, front tibiae and apex 

 of hind tibiae with short golden pile ; wings gray-hyaline with black veins. 



Female : Length 12 mm. Pile of face and frons sparse and shorter ; 

 ocellar bristles brown ; pollen of thoracic dorsum more golden brown ; two 

 median dorsal gray lines ; a bare brown spot near humeri, more noticeable 

 than in male ; abdomen much longer and more slender ; pile much shorter 

 and entirely white ; segments beyond fifth shinimg black ; a narrow brown 

 posterior margin to sixth and seventh segments; a circlet of stub-like 

 spines at tip of ovipositor. 



Holotype (No. 480), male, and allotype (No. 481), female, 

 collected at Hood River, Ore., June 13, 1917 (F. R. Cole), in 

 Museum of California Academy of Sciences. 



Paratypes in the author's collection taken at Forest Grove in 

 July and August. This species is near the genus Heteropogon 

 in general appearance. All specimens were taken near water, 

 those at Forest Grove alighting on drift wood and sticks along 

 a small creek. 



17. Cyrtopogon nebulo O. S. 



(Plate 16, fig. 15) 



The male of this species has never been described and some 

 of the characters are given below. 



Male : Differs in a few respects from the female. Besides the spines, 

 some of the hairs are brown at the base and white at the tips, as they are in 

 the female ; pile of the aMomen longer, white on the first, second, and base 

 of third segment ; rest of abdominal pile brownish black with white tips in 

 certain lights ; short golden pile on apical half of front and hind tibiae and 

 inner side of front and hind tarsi, a character some other species have. 

 The genitalia are not of the typical form in this genus, quite densely covered 

 with brown and black bristly hairs and pile. 



Wings infuscated but there are several hyaline spots and streaks in addi- 

 tion to the brown clouds ; costa armed with short, thickly set, curved 

 bristles or hairs ; this costal fringe very noticeable, that part on the basal 

 two-thirds of the wing being about as long as the second antennal joint. 



Allotype (No. 482), male, in the Museum of the California 

 Academy of Sciences, obtained in the subalpine regions on Mt. 

 Jefferson, July 25, 1909 (J. C. Bridwell). 



A female collected at Horse Lake, July 25, 1909 (J. C. 

 Bridwell), has the antennal style a trifle shorter than the third 

 segment. The second vein in one wing has an adventitious 

 anterior branch near the tip and a stump of a vein just before 

 it. Inner side of the hind tibiae and tarsi with short golden 

 pile. The margin of scutellum golden pollinose. 



