G. C. DAVIS. 211 



Chorinseiis costatus n. sp. 



9 -J, .—4-6 mm. Slender, bluck, pilose ; face, mouth-parts, cheeks beneath and 

 tegulse. lemon-yellow ; legs: in 9 uniform ferruginous, in % two anterior pairs 

 paler, and posterior cox» blackish; wings dusky hyaline, nervures and stigma 

 reddish brown ; antenuge brown, paler beneath ; mesonotum rather coarsely punc- 

 tured ; metanotum with six carinte, mucrouate at outer apical corners; nietapleurse 

 longitudinally aciculate, except in upper anterior corner, which is polished ; 

 mesopleurse i)unctured, aciculate above middle coxpe ; abdomen shining, coarsely 

 punctured, carinse prominent and extending nearly to the apex of the third seg- 

 ment ; basal segment with five carinse ; femora iucrassate. 



One female and two males from New Hampshire and Connecticut 

 (types, coll. Amer. Ent. Soc). 



C'liorinieiis pusilliis n. sp. 



9 "J, . — 4-6 mm. Black, pilose; face and mouth-parts lemon-yellow, except 

 oval spot beneath anteunse, suture above clypeus and base and apex of mandibles, 

 which are brown ; legs vary from pale rufous in front legs to almost entirely 

 black in hind leg; the posterior coxpe and femora are black, and usually the same 

 of the middle legs; anterior femora usually pale; apex of trochanters and base 

 of tibise in hind legs, rufous ; wings hyaline, nervures brown ; antennge brown, 

 six carinse on metathorax ; metapleurte longitudinally aciculate, finely punctured 

 on upper anterior portion ; mesopleurte minutely punctured, aciculate above mid- 

 dle coxfe ; abdomen short, thickset, clavate in 9 . subclavate in % , shining, finely 

 punctured ; five carina} on basal segment, three on second and extending, rather 

 faintly, onto the base of the third. 



Two females and two males from Washington, Colorado and Mt. 

 Washington, N. H. (Mrs. Slosson). Types, coll. G. C. D. and 

 Amer. Ent. Soc. 



Choriiiieus pleturus u. sp. * 



9. — 7 mm. Black, robust, with legs, mandibles and antennse dark rufous; 

 palpi and tegulse whitish ; orbital lines in emarginations each side of antennse 

 and spot on face between antennse, yellow; scape and posterior coxa? black; 

 wings subhyaline, nervures and stigma reddish brown ; mesonotum finely punc- 

 tured ; metanotum with six carinse, not strongly mucronate at apical corners; 

 metapleurse with aciculations running diagonal toward coxse, and only on apical 

 third ; mesopleurge without aciculations, minutely punctured ; abdomen depressed 

 on first two segments, subcylindrical and slightly clavate beyond ; basal segment 

 with four carina;, the two median being rather widely separated ; second segment 

 with three carinse, the lateral ones not reaching half way across, the median one 

 extending the whole length of the segment. 



One specimen from Agricidtural (/ollege Michigan (type, coll. 

 Michigan Agricultural College). 



Choriiiseus niarlatti Ashm., Trans. Amer. Ent. Soc. xxiii, 200. 



9- — 4 mm. Black, with face, antennge, mouth-parts, tegulte and legs, except 

 hind coxae, which are blackish at base, honey-yellow; wings hyaline, nervures 

 and stigma brown ; mesonotum shining, polished, scarcely punctured ; metanotU7n 

 with the usual carinse; metapleurse longitudinally aciculate above hind coxa^ ; 

 remainder of meta- and all of mesopleura; polished and without distinct punc- 



TRANS. AM. ENT. SOC. XXIV. ,\UUL;.'*T, 1897. 



