NORTH AMERICAN IIYMENOPTERA. 5U 



of anterior and medial tibiae all yellow; front distinctly impressed medially, 

 with a few shallow punctures ; iu front of the anterior ocellus is a distinct depres- 

 sion or pit; anteniife reaching to the postscutellum ; the dorsulum as in elegnns, 

 except that it is covered with large, shallow, separated punctures, and the im- 

 pressed line near the tegulte is not distinct; metathorax with a transverse exca- 

 vation at the base, only a little broader medially, the medial sulcus short, not 

 more than half as long as in C elegans, otherwise the metathorax is the same; 

 wings yellow-hyaline, the apex dusky. Length 9 mm, 



% . — What I take to be the % differs from the 9 as follows: antennai as long 

 as the head and thorax together, entirely ferruginous, except the first two joints 

 beneath, which are yellow; the black on the front and vertex amalgamated into 

 one large spot; a spot behind each shoulder, the anterior coxse behind, the meso- 

 pleurse and metathorax, except a large blotch on the latter laterally and the pos- 

 terior angles all black ; front with a few scattered, shallow punctures, with a 

 rather deep pit medially and moi"e shallow one before the anterior ocellus; the 

 dorsulum with large separated punctures, the depressions very slight; the meta- 

 thorax laterally with strong sparse punctures, the apical half, medially, finely 

 granulate; the anterior tibite in front and the first joint of the middle tarsi 

 yellow ; abdomen entirely ferruginous, in some specimens segments 2—4 having 

 the apical margin narrowly emarginate on each side anteriorly, and segments 

 5 — 7 with a spot medially yellow, the spot on the seventh segment small. 

 Length 8 — 10 mm. 



Described from one 9 f^ntl six % specimens. The 9 is from 

 Nebraska, and all the males are from Washington. The black on 

 the front and the sides of the thorax will separate this species from 

 elegam. 



Unidentified Species. 



IC. ('ei*opaIe!« iiiiiiinia Prov. 



Ceropales minima Prov., Add. Hym. Quebec, p. 26.5, % (published in Le 

 Nat. Can. xvii, 6). 



" % . — Length .18 inch. Black, with pale yellow spots. The face below the 

 antennse, the orbital lines to the top of the eyes, the clypeus, labruni, the first 

 two joints of the antennte beneath, the posterior border of the prothorax, a spot 

 on its anterior angles, the scutcllum and postscutellum with a double spot on the 

 inferior angles of the metathorax, a spot in front of the four anterior coxse, the 

 apex of the posteriors with a line externally, a large spot on the sides of the 

 segments 1 and 2 of the abdomen, with two spots at the end of the beak (bee) 

 pale yellow. Wings slightly obscui-e at the extremity, the stigma ferrugiTious. 

 Legs pale yellow, all the femora black, except the apex, the posterior legs entirely 

 black, their tibiaj and tarsi ferruginous, brownish at the a|iex. .\bdomen oval- 

 oblong, polished, brilliant. 



"Hull (Guignard)." 



TR.\NS. AM. ENT. SOC. XIX. APKIL, 18}>2. 



