660 NEW SPECIES OP BRACONIDiE. 



17-joiated antennae, a fact not mentioned by Fitch; the specimens with 

 20-jointed antennae, as described by him, being males. 



Habitat. — Washington, D. C, and Lafayette, Indiana. (F. M. Web- 

 ster.) 



Aphidius lachni n. sp. 



Female. — Length, 2f mm . Black, polished; collar to tegulae, and more 

 or less of mesopleura, and the legs, including all coxa}, pale ferruginous ; 

 abdomen, piceons; the sutures, pale ; petiole, black. The antenme are 

 19-jointed, black; the suture between 2d and 3d joints onLy pale; the 

 joints of the flagellum are at least twice as long as thick, pubescent; 

 thorax smooth, impunctured ; metathorax areolated ; the legs, meta- 

 thorax, petiole, and abdomen are more distinctly covered with white 

 hairs than usual ; the petiole is nearly thrice as long as wide, black, 

 delicately sculptured, and slightly constricted at the middle; wings, 

 hyaline; the veins, dark brown; the 2d branch of the radius being 

 about one and a half times as long as the transverse cubitals. 



The male differs from the female in having a darker colored abdomen, 

 either black or piceons; the 2d suture only pale, while the antemneare 

 20 or 21 jointed, the long terminal joint being sometimes divided into 

 two joints. 



Habitat. — Alameda County, California. 



Described from several specimeus, labeled No. 367°, reared in Novem- 

 ber, 1887, by Mr. Albert Koebele, from an Aphid, Lachnus sp.,ou Poplar. 



Aphidius californicus n. sp. 



Female. — Length, 2f mm . Black, polished ; the month parts pale ; legs 

 honey-yellow, hind coxae black; anterior half of the strongly constricted 

 petiole, honey -yellow ; postpetiole, black; the sutures between petiole 

 and 2d and between the 3d and 4th segments, pale yellowish. The an- 

 tennae are 19 jointed, much more slender thau in A, lachni, the joints of 

 the flagellnm being at least two and a half times as long as wide ; thorax 

 smooth, impunctured; metathorax, areolated and rugose; abdomen 

 about one-third longer than the head and thorax together, long, lance- 

 olate, pointed at apex. Wings, hyaline; veins, brown; the basal 

 nervnre almost black ; the 2d branch of the radius is nearly twice the 

 length of the transverse cubital nervnre. 

 Habitat: — Placer County, California- 

 Described from one specimen, labeled " Placer County, Cal., August," 

 and sent to the Department by Mr. Albert Koebele. 



Aphidius obscuripesn. sp. 



Female. — Length, 2""". Black, polished; face, mouth parts and an- 

 tenna! tubercles, brownish-yellow ; leas brown ; front coxae and femora, 

 except along the upper surface, and all trochanters, pale brownish-yel- 

 low ; hind coxa' and femora unicolorous, dark brown; abdomen piceous 

 brown, the 2d, 5th, and 6th sutures yellowish- white. The autenme are 



