AMERICAN HYMENOPTERA. 95 



black ; ia a favorite light the thighs have a slight purplish reflection. 

 Length two-fifths of an inch." 



Hah. — " Mexico." Not identified. 



26. Fompilus anceps. 



Pompilus anceps, Smith, Trans. Ent. Soc. Lond. 3d ser. i, p. Sfi, 9 • 

 "■Female. — Length 11 lines. Black; head and thorax with a beauti- 

 ful changeable blue silky pile ; six apical joints of the antenna? orange- 

 yellow 5 metathorax transversely striated; wings blackish-brown, with 

 bright violet iridescence in certain lights, their extreme apex milky- 

 white ; tibise and tarsi thickly set with short stout spines; abdomen 

 with a splendid blue iridescence." 

 Hah. — " Panama." Not seen. 



B. Body Mack, handed with cinereous. 



27. Pompilus unicus, n. sji. 



Male. — Small, black, most of the body clothed with a dense, ap- 

 pressed, cinereous pubescence, the portions not covered with this pu- 

 bescence are black, with a slight opaline reflection ; antennae short, 

 stout and opaque black; anterior margin of the clypeus truncate; tho- 

 rax unusually gibbous ; prothorax with a transverse, slightly inter- 

 rupted, black band near the posterior margin, which latter is arcuate; 

 mesothorax with two large, black, subquadrate spots on the disk, nearly 

 confluent ; metathorax abrupt on the sides and behind, black, the api- 

 cal half silvery-cinereous ; wings hyaline, the apical third fuliginous, 

 with a faint, transverse, subhyaline streak just beyond the tip of the 

 third submargiual cell ; the basal series of transverse nervures is nar- 

 rowly margined with fuliginous ; marginal cell broad sublanceolate, se- 

 cond submarginal subquadrate, the third smaller and much narrowed 

 towards the marginal; legs rather short and stout, the femora within, 

 extreme tips of tibiae, and the tarsi, except basal joint, black, the rest 

 covered with a dense cinereous pile ; anterior legs short and stout, not 

 spinose, the four posterior tibiae strongly spinose; abdomen short, 

 ovate, convex, second segment very large, forming a shield, as it were, 

 to cover the reiuaining segments when retracted, apex subcompressed ; 

 shining black, first and second segments each with a broad band of 

 dense cinereous pubescence, placed a little before the middle, remain- 

 ing segments each with a large, transverse, cinereous spot on the apical 

 middle, covering nearly the entire disk of the fourth and following 

 segments; venter clothed with a fine, dense, cinereous pile. Length 

 3-i lines. 



//a6.— Cuba, (Coll. Dr. J. Gundlach, No. 532). 



