ART. 10. NEW SPECIES OF THE FAMILY TTPUUDAE ALEXANDER. 7 



humeral regions light sulphur-yellow; scutum with the median 

 area light browTi, the lobes yellow with the centers narrowly in- 

 fuscated; scutellum pale brown, the caudal margin conspicuously 

 light yellow; postnotum light bro^vn, the anterior lateral angles 

 yellowish. Pleura whitish yellow, the mesepisternum and the 

 mesosternum faintly darkened. Halteres yellow. Legs relatively 

 slender, obscure yellow, the tarsi infuscated. Wings with a yellow- 

 ish suffusion, the stigmal region slightly darker; veins pale brown. 



Abdomen brownish yellow. Male hypopygium generally similar 

 to that in E. villosa Osten Sacken; outer pleural appendage black- 

 ened on the outer half, not blade-like; inner pleural appendage 

 much shorter, at the curved tip suddenly narrowed into a powerful 

 spine of which the apex only is darkened. Outer gonapophyses 

 chitinized, cultriform, the tips acute; inner apophyses shaped like 

 shepherd's crooks. 



Described from a single male, collected at Gold Lake Camp, 

 Plumas County, Cahfornia, July 22, 1916 (H. G. Dyar). 



Type.~Ua\e, Cat. No. 26084, U.S.N.M. 



Erioptera dyari is a very distinct species of the genus. It is 

 dedicated to the collector. Dr. Harrison G. Dyar. 



ERIOPTERA (ERIOPTERA) DILATATA, new species. 



Allied to E. villosa Osten Sacken; eyes of the male very large, 

 contiguous or nearly so; general coloration reddish brown, the pro- 

 notum and lateral margins of the mesonotal praescutum obscure 

 yellow; male hypopygium with the inner pleural appendage dilated 

 into a triangular blade at apex; gonapophyses small, covered with 

 microscopic spinulae. 



Hale. — -Length 5 mm.; wing 6 mm. 



Female. — Length 5.4 mm.; wing 6.8 mm. 



Rostrum and palpi brown. Antennae dark brown. Head light 

 fawn-colored, more yellowish adjoining the inner margins of the 

 eyes. Eyes of the male very large, contiguous. 



Pronotum yellowish. Mesonotum reddish brown, the lateral 

 margins of the praescutum, especially the humeral regions, yellowish. 

 Pleura light purplish brown. Halteres yellowish. Legs with the 

 femora brownish yellow, the tips narrowly darkened; remainder of 

 the legs obscure brownish yellow, the terminal tarsal segments dark 

 brown. Wings with a brownish yellow tinge, paler than in E. 

 villosa, the stigma and apical region not conspicuously darkened. 



Abdomen of male dark brown, of female obscure yellow, narrowly 

 trilineate with brown above. Male hypopygium with the inner or 

 shorter pleural appendage conspicuously dilated into a triangular 

 blackened blade at tip, the apex slight produced, at the caudal angle 



