NORTH AMIORICAN HYMENOPTERA. Ot 



aud sparsely punctured, especially the dorsuliiiii and sides; nietathorax with a 

 transverse excavation at the base, which is much broader and somewhat trian- 

 gular, polished medially; from this point there begins a long, distinct sulcus, the 

 sulcus ending between two depressions on the apical portion, the metathorax 

 strongly punctured laterally, the medial portion with microscopic punctures, 

 shining ; the metapleura? smooth, polished ; legs ferruginous, the coxse black, the 

 anterior pair in front and a spot at the tip of the median and posterior pair pale 

 yellow. Length 7 — 8 mm. 



Mexico; Orizaba (Sumichrast). Two specimens before me have 

 no trace of a series of very short, fine strife at the anterior margin 

 of the dorsulum mentioned by Smith, and have on the abdomen a 

 small yellow spot on the sides of the first and a larger spot on the 

 sixth segment. The apical margins of the segments testaceous. 



13. Ceropales Robinson ii Cress. 



Ceropales Robiiixonii Cr., Tr. Am. Ent. Soc. i, p. 140, % , 1867, fig. 15. 

 Ceropales riifiventris Walsh, Amer. Entom. i, p. 163, 9 %i 1869, fig. 108. 

 Ceropales superba Prov.. Faun. Ent. Can. p. 810. 9i 1883. 



9- — Blat^k, abdomen ferruginous; clypeus, except an oblong, medial spot, 

 labrum, mandibles, sides of face, anterior orbits broadl.y, the posterior orbits 

 narrowly, sjiot between the antennse, first two antennal joints beneath, posterior 

 margin of prothorax, emargiuate in the middle anteriorly, spot on the shoulders, 

 spot on postscutellum and posterior angles of metathorax all yellow; the first 

 two antennal joints above rufous : tegulje brown ; wings fuliginous, with a viola- 

 ceous reflection, apical half of the marginal cell, the upper half of the third 

 submarginal and the fourth submarginal entirely hyaline; antennpp as long, or 

 slightly longer than the head and thorax together; head and thoi-ax glabrous, 

 impunctate; the front with a strong medial impressed line; dorsulum with two 

 longitudinal depressions; metathorax with a transverse excavation at base, 

 broadest niediall.y. from which begins a long, deep, medial sulcus; the suture 

 between the meso- and metapleurse foveolate; front, the thorax on sides and 

 beneath with silvery pubescence; legs ferruginous, the anterior and median 

 coxfe black, the former in front, aud a spot at tip of the latter at the tip of the 

 posterior pair black at the base; the apical margin of the abdominal segments 

 yellowish testaceous. Length 7 — 8 mm. 



%. — Antennae longer than the head and thorax together; cl.vpeus and face 

 entirely, spot on dorsulum posteriorly, on scutellum, on the mesopleurfe, above 

 the medial coxfe, and a small spot on the abdominal segments 2 — 5 laterally, all 

 yellow; the knees, the apex of the tibiae and the tarsi yellowish; wings sub- 

 hyaline, paler at the same place where the 9 ''-'s the wings hyaline. Lenuth 

 6—7 mm. 



Occurs from Canada to Virginia, westward to Illinois. I have 

 united with this species rujivenfris and superba. The description of 

 the former agrees in every particular with this species. The descrip- 

 tion of superba also agrees with this species, except that the hyaliiir 

 spot on anterior wings is not mentioned. 



TRANS. AM. ENT. SOC. XIX. (8) .\PKIL, 1892. 



