152 [January 



gg. Abdomen subsessile. 

 Crabro cubensis. n. sp. 



Black; face, cheeks and clypeus, golden; basal half of antennae, prothorax. 

 tubercles, spot before tegulee, scutellums, legs, and five transverse spots on each 

 side of abdomen, yellow : wings fusco-hyaline. 



Female. — Black, opaque ; head large, quadrate, very densely and 

 finely punctured ; sides of the face, clypeus, extending on each side 

 beneath the eyes, and the cheeks, densely clothed with bright golden 

 pubescence; antennae with the three basal joints, yellow, the fourth 

 fulvous, the remainder blackish. Thorax deeply and rather closely 

 punctured , prothorax narrow, yellow, sharply earinated in front, with 

 the lateral anterior angles reflexed and very acute; tubercles, and a 

 rather large, oblique, subcuneiform mark before the wings, yellow; scu- 

 tellum shining, sparsely punctured, entirely yellow, extreme sides acute, 

 with a small spot on each basal corner; postscutellum with a narrow, 

 transverse, yellow line; metathorax irregularly rugose, the sides trans- 

 versely rugose, the posterior face abrupt ; tegulae dull honey-yellow, 

 shining. Wings pale fusco-hyaline. darker at tips; nervures ferrugi- 

 nous. Legs yellow, their coxae and apical half of the posterior femora 

 black, tips of the tarsi dusky; the four anterior femora sometimes tinged 

 with ferruginous. Abdomen subsessile. short, ovate, convex, shining, 

 very minutely punctured ; sides of all the segments, except the apical 

 one, with a more or less transverse, yellow line or spot, those on the 

 first and fifth segments smallest, those on the fourth longest and nearly 

 meeting on the disk; venter entirely black, shining. Length 4 — 5 

 lines; expanse of wings 7 — 8 lines. 



Collect irm. — Ent. Soc. Philad. Three specimens. 



Crabro croesus, St. Farg. 

 Solenius crcesus, St. Farg. Ann. Soc. Ent. Fr. iii, p. 727; Hym. iii, p. 132. Dahlb. 

 Hym. Europ. i, p. 388. Guer. LaSagra's Hist. Cuba, Ins. p. 767. 

 Crabro crcesus. Smith, Brit. Mus. Cat. iv, p. 424. 

 Collection. — Ent. Soc. Philad. Two specimens. 



Genus PSEN, Latr. 

 Psen argentifrons, n. sp. 



Black, shining ; face silvery ; tubercles, tibise and tarsi, yellow ; apical mar- 

 gins of abdominal segments obscure testaceous; wings hyaline, iridescent, third 

 submarginal cell with its outer nervure angular. 



Female. — Black, shining; head rather wider than the thorax; face, 

 beneath the insertion of the antennae, the clypeus and the cheeks, 

 densely clothed with bright silvery pubescence; mandibles ferruginous, 

 black at tips ; antennas blackish above, rufo-piceous beneath. Thorax 

 shining, finely punctured ; a line over the collar, most of the pleura. 



