BIOLOGICAL PAPERS. 301 



brownish testaceous; tarsi of posterior legs and tibia? at base and apex brown- 

 ish, apical tarsal joint of anterior and middle legs brownish; second and third 

 dorsal abdominal segments blackish at base, ovipositor and sheaths black or very 

 dark brown, ovipositor tipped with brown; legs somewhat testaceous, especially 

 the coxae and the trochanters; vertex, front and occiput largely black. 



Type: University of Kansas. Type locality : Sedgwick county, near Wich- 

 ita, Kan. Taken in vineyard, September, 1895, E. S. Tucker. 



Thersilochus quintilis, n. ep. 



Very like the preceding, of which it may prove to be the male. Length, 4.5 

 mm. Differs from mimeticus as follows: Face all ferruginous, only the mandi- 

 bles yellowieh, no yellowish orbital line; posterior femora, tibia? and tarsi all 

 decidedly brownish; scutellum paler, more yellowish brown than the dorsulum, 

 tegument around the scutellum with a rather broad border of black; postscu- 

 tellum, however, largely of the same color as the scutellum; base of metanotum 

 blackish, areola not separated from the petiolarea, the lateral ridges almost 

 parallel, on the apical third of the metanotum the petiolarea broadens suddenly, 

 forming an angle on each side ; beyond the petiole the dorsal abdominal segments 

 are black at base; antenna? twenty-eight jointed; second recurrent nervure 

 almost interstitial, the stump of a vein beyond the recurrent nervure about one- 

 half the length of the transverse cubitus. 



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

 E. S. Tucker. 



Thersilochus hamiltonensis, n. sp. 



Male. — Length, 5.5 mm. Head dullish; face minutely sculptured, rather 

 sparsely, indistinctly punctured: antenna^ more than thirty-one jointed (tips 

 broken). Dorsulum dull, closely punctured, the punctures not sharply defined; 

 parapsidal groove indicated only anteriorly by shallow impressions: scutellum 

 somewhat shining, sparsely, indistinctly punctured; metanotum with the basal 

 area nearly obsolete, the areola if completed would be pentagonal, posterior 

 boundary not present, areola, therefore, confluent with the petiolarea, about 

 twice as long as wide, the lateral boundary angulated above the middle, 

 petiolarea nearly a parallelogram, slightly angulated below the middle, trans- 

 versely striate, somewhat punctured, apical lateral area rugose, areola and lateral 

 areas all shining and more or less distinctly punctured, the areola more dis. 

 tinctly punctured than the lateral areas; mesopleura polished, rather closely, 

 distinctly punctured beneath the oblique channel, which is smooth, highly pol- 

 ished and only rather indistinctly striate in the anterior extremity, above the 

 channel the tegument is chiefly smooth and polish d; metapleura dullish, min- 

 utely granular, rather sparsely punctured; wings hyaline, stigma and nervures 

 pale brown ; basal and apical abcissa? of cubitus and apical abcissa of subdis- 

 coidal nervure almost hyaline, transverse cubital nervure nearly half the length 

 of the first abcissa of the radius, the cubital abcissa beyond the transverse 

 cubitus half the length of the transverse cubitus, the abcissa beyond equal to 

 the preceding or nearly, second abcissa of the discoidal nervure nearly one third 

 the length of the recurrent nervure. Petiole shining, second segment dullish 

 very finely, longitudinally wrinkled, almost striate, segments beyonds the second 

 dullish, sparsely, indistinctly punctuate. Head and thorax almost uniformly 

 covered with short, whitish pubescence. Black; face yellow beneath the an- 

 tpf'" ae except for a median line of black which extends half-way down between 

 the antenn?e and the clypeus; clypeus, mandibles and a rather broad continuous 

 orbital line yellow ; basal joint of scape pale brownish, remainder of antenna 



