ALDRUIl AND DA KLI NMiTON. 



«)1 



Wings sliglitly yellowish; small and laijie cross-veins and tlie apices of the 

 longitudinal veins distinctly bordeied with brown. 



Abdomen yellow, each segment with a blackish i)osterior border; liypopygium 

 of male large, brighter yellow. 



Legs light j'ellow. 



Eiglit male iind seven female .specimen?. Aldrich : Knoxville, 

 Tennessee (Summers) ; Battle Creek, Michigan ; South Dakota, 

 July 2n(l. U. S. X. M. : O.swego, New York; Milwaukee County, 

 Wisconsin, July 15th. Johnson : Philadelphia, Penna. ; Delaware 

 Water Gap, New Jersey; Montreal Island, Quebec ; Auburndale, 

 Mass.; Burlington, Vermont, and Ft. Collins. C'olorado ; dates from 

 June 25th to August 14th. Melander : Wisconsin (Wheeler); 

 Angora, Penna., September 17th. 



The type locality was New York. 



Heloinyza linibata Thomson (PI. IV, fig. 6). 



Length 5.3 mm. ; of wing 6.2 mm. 



General color pale yellow; legs a little lighter; wings strongly iufuscated. 



Head yellow; eye large, round; vertex and upper part of the front safiVon- 

 yellow, lower part of the front lighter yellow, densely pubescent; ocellar trian- 

 gle also pubescent; antenuaj pale yellow, third joint oval; arista of moderate 

 length, plumose; vibrissse of medium size, one on each side; cheeks narrow. 



Thorax entirely pale yellow, dorsum densely pubescent; mesopleura baie; 

 sternopleura with one strong bristle and numerous small black hairs; scutelium 

 safFrou-yellow, bare except the ordinary four bristles and an occasional small 

 hair near the margin. 



Wings with the marginal and usually the first submarginal cell distinctly 

 infuscated, also the ends of all the longitudinal veins; both cross-veins distinctly 

 bordered with brown. 



Abdomen of the female nearly black, that of the male not nearly so dark, but 

 with a black band on the posterior edge of each segment; hypopygium of ihi- 

 male large, yellow. 



Legs straw-yellow ; hind knees blackish. 



Five male and nine female specimens. Aldrich : San ^fateo, 

 Palo Alto and San Jose, California, January 26th to April 12lh; 

 Orcas Island, Guemes Island, and Keyjjort, Washington, July 7ih 

 to August 7th. 



Type locality, (California. 



Heloiiiyza qiiiiiquepuuctata Say. 



llelomi/sa latericia Loew, Centuries, ii, 89. 



Length 5.7-6 mm. ; of wing 6 mm. 



General color yellow, the large and small cross-veins and the apices of the 

 longitudinal veins distinctly bordered with brown; scutelium entirely pilose; 

 eyes large, ovate. 



Front safTron-yeliow. broader at the vertex than at the antenna-; face lighter 

 yellow, broadening from the antenuie down ; anteniue yellow, third joint large, 



TEANS. AM. ENT. SOC. XXXIV. .MAKCH. 1908. 



