24 POMONA JOURNAL OF ENTOMOLOGY 



Genus Aphidius Nees 



All of the species described below are not black, but testaceous, and all but 

 one have much yellow. In all, the face is largely yellow. In all, the subdis- 

 coidal nervure is interstitial and does not touch the second discoidal cell. 



A. Second abscissa of radius shorter than the transverse cubitus ; 

 a small species with almost the entire body and appendages 

 concolorous testaceous. delicatus n. sp. 



AA. Second abscissa of radius longer than the transverse cubitus; 

 large species with yellow legs. 

 B. Part of sternum only, yellow; length 2 mm. 



C. Antennae 19-jointed, first two articles yellow; all of face 



below antennae, yellow. coloratus n. sp. 



CC. Antennae 20-jointed; first two articles testaceous; only 



the clypeus yellow. coloratus var. ferrugi}iosiis n. var. 



BB. All of lower half of thorax yellow; length 2.5 mm. pulcher n. sp. 



Aphidius delicatus n. sp. 



Male: Length, 1.5 mm. Whole insect testaceous, abdomen and legs basally 

 paler. Clypeus and mandibles yellow. Metanotum smooth, shining, with a 

 delicate median carina which splits posteriorly, the branches diverging to pos- 

 terior border; and on either side posteriorly with a large rounded sharply 

 bordered pit. Apparently near to Aphidius avcnaphis Fitch. 



Ormsby County, Nevada. Coll. C. F. Baker. 



Aphidius coloratus n. sp. 



Female: Length 2 mm. Head and thorax piceous, abdomen testaceous, legs 

 entirely, prothorax, mouthparts, all of face below antennae, and first two 

 joints of antennae, yellow. Antennae 19-jointed, fiagellum piceous. Metano- 

 tum smooth and shining, with a median carina which is split behind and 

 encloses a small lozenge-.shaped area which extends to posterior border ; on 

 either side of this latter area is a large sharply bordered pit. 



Jeannette, Pa. Coll. H. G. Klages. 



Aphidius coloratus var. ferruginosus n. var. 



Female: Length 2 mm. Piceous to dark testaceous, petiole and hind mar- 

 gin of second segment pale. Legs sternum, and prothorax, yellowish to 

 ferruginous. Clypeus and mandibles yellowish. Antennae 20-jointed, piceous, 

 first two articles testaceous. Metanotum identical with that in the species. 



Polk County, Wisconsin. Coll. C. F. Baker. 



Aphidius pulcher n. sp. 



Female: Length 2.5 mm. Head and thorax above, laterial margins of 

 second tergiun, and discs of third, fourth and fifth terga shining piceous. the 

 rest of abdomen, the sternum, pleurae and prothorax, ferruginous to yellowish. 



