BIOLOGICAL PAPERS. 283 



not sculptured; ovipoBitor distinctly longer than the abdomen, about one-fourth 

 longer. Very thinly pubescent, almost bare, the hairs fine and whitish; an- 

 tennae as usual quite hairy; the legs less hairy than the antenna?. Black; 

 scape, pedicellum, legs and abdomen in part testaceous; abdomen with the first 

 segm'ent almost unicolorous with the legs, the succeeding segment brownish, 

 otherwise black or blackish ; ovipositor dark castaneous, sheaths black. 



Type: University of Kansas. Type locality : Douglas county, Kansas. One 

 specimen. August, E. S. Tucker. 



Aphaereta subtricarinata, n. sp. 



Superficially like A. auripes, from which it differs in the absence of a strong 

 transverse ridge on metathorax and in the non striate posterior face thereof. 



Female. — Length, 3 mm. Head smooth, polished, no impressed line between 

 occiput and ocelli; antennit twenty-four jointed, scape and pedicellum together a 

 little longer than the first joint of the flagellum, joints of the flagellum sub- 

 equal. 



Thorax largely smooth and polished ; the parapsidal grooves obsolete except 

 on the anterior third of the mesonotum, where they are quite distinct; meso- 

 pleura with a dimple at the middle of the posterior margin, a somewhat crenu- 

 late shallow impression on the lower half; scutellum convex, quite elevated, 

 smooth and polished ; metathorax with a smooth superior face, that is shining 

 and bisected longitudinally by a distinct, sharp ridge, the posterior face dullish) 

 wrinkled and with two parallel longitudinal raised lines close together, one on 

 each side of the medial line; metapleura? smooth and polished; wings trans- 

 parent, faintly tinted with brown, stigma and costal nervure dark brown ; other 

 nervure3 blackish testaceous, first abcissa of the radius about half the length of 

 the second transverse cubitus, the second abcisea about as long as the first 

 transverse cubitus and the first abcissa of the radius together, the first trans- 

 verse cubitus almost as long as the recurrent nervure, the transverse median 

 nervure almost interstitial, received by the discocubital cell a little beyond the 

 basal nervure. Abdomen smooth and polished, the first segment dullish and 

 wrinkled, the basal third with two diverging, distinct raised lines; ovipositor 

 about three-fourths the length of the abdomen. Almost bare, sparse, fine whit- 

 ish apparent on the face and end of abdomen. Black; mandibles and part of 

 prothorax brownish testaceous; scape, pedicellum and legs testaceous; terminal 

 joint of the tarsi and claws dark brown; basal joint of abdomen castaneous; 

 ovipositor brownish testaceous, sheaths black or nearly. 



Type: University of Kansas. Type locality : Douglas county, Kansas. Au- 

 gust. E. S. Tucker. 



Paratype with twenty-three joints to the antennje and 2.5 mm. in length, 

 taken at night, in May ; Lawrence, Kan. E. S. Tucker. 



Aphaereta delosa, n. sp. 



Related to subtricarinata and to muscEe, perhaps identical with muecae. 



Female. — Length, 2 mm. Head and thorax as in subtricarinata; antennae 

 twenty-one jointed, scape and pedicellum together distinctly longer than the 

 first joint of the flagellum, but not much longer; first joint of the flagellum a 

 little shorter than the third, the second joint distinctly longer than the third, 

 remaining joints subequal ; wings nearly as in muscEe ; first abcissa as long as 

 the second transverse cubitus, first transverse cubitus a little longer than twice 

 the length of the first abcissa of the radius, second abcissa of the radius twice 

 the length of the first transverse cubitus, transverse median nervure very short, 

 shorter than the second transverse cubitus, received by the discocubital cell a 



