440 DESCRIPTIONS OF ICHNEUMONID^ ASHMEAD. 



Describee! from one specimen, received from Mr. Albert Kcebele, 

 labeled " Taken ovipositing in a Syrphus larva feeding on cabbage 

 aphis." 



Bassus xanthopsis sp. nov. 



Male.— Length, 5 ram . Black, shining, sparsely punctate. Face, an- 

 terior orbits, scape beneath, clypeus, mandibles, palpi, lateral margins 

 of mesothorax, prosterunm, posterior lateral angles of collar, anterior 

 margin, of mesosternum, a large spot on mesopleurre below, and ante- 

 rior and middle legs, including coxse, lemon-yellow. Hind legs rufous, 

 the coxse black, their apices aud. trochanters yellow. Metathorax 

 closely punctate, without keels. Abdomen black, the apex of the 

 second segment, the third wholly, and the apical margins ot fourth and 

 flftb, yellow-ferruginous ; the first segmeut is longer than wide, with 

 very prominent lateral tubercles near the base, it, as well as the second 

 segment, sculptured, opaque. Wings hyaline; stigma and veins 

 brown ; the costae to near the stigma and a spot at base and apex of 

 stigma, yellow. 



Habitat. — Alameda, Cal. 



Described from one specimen, received from Mr. Albert Koebele, 

 reared from a Syrphus feeding on Aphis brassinc. 



This species may be the male of orbitalis, but its different color, ab- 

 sence of keels on metathorax, and the difference in the sculpture of the 

 abdomen, make it quite improbable and justify me in considering it a 

 different species. 



Bassus euurae sp. nov. 



Male. — Length, 5.4 mm . Stature similar to B. agilis Or. Black, shin- 

 ing. A V-shaped mark on face, clypeus, mandibles, except teeth, 

 palpi, teguke, a spot in front and beneath, hook-shaped marks at sides 

 of mesonotum, scutellum and postscutellum, white. Legs, including 

 coxre, the sternum aud pleurae below, ferruginous; the posterior tibise, 

 except toward base, aud the tarsi, black. The parapsidal grooves of 

 mesonotum are slightly indicated anteriorly ; metathorax keeled. Ab- 

 domen entirely black, the three basal segments rugulose, subopaque, 

 the first being bicarinated on disk at base, the terminal segments 

 smoother and polished. Wings hyaline, the stigma and veins dark 

 brown ; betweeu the stigma and parastigma is a pale spot ; areolet 

 absent. 



Habitat.— Placer County, Cal. 



Decribed from one specimen, received from Mr. Albert Kcebele, 

 and reared from a saw-fly on willow. 



Bassus virginiensis sp. nov. 



Female. — 5.6 mm . Stature similar to B. euurce, black, shining. Face, 

 lower part of cheeks, mandibles, palpi, pro- and mesosternum, lower 

 part of rnesopleume, coxte, trochanters, posterior lateral angles of collar, 



