482 



[June 



middle, especially on the first three segments ; the fascia on the first 

 segment is somewhat wavy; apical segment black, immaculate, pubes- 

 cent, pinched in at the sides, and subacute at tip ; venter black, shin- 

 ing and immaculate. Length 4 lines; expanse of wings 6| lines. 

 One specimen. 



10. Crabro nigrifrons, n. sp. 



Black; clypeus silvery; scape of antennae, interrupted line on collar, tuber- 

 cles, legs in part, two spots on first abdominal segment, and interrupted fascia? 

 on the following segments, yellowish-white ; wings subhyaline ; abdomen sub- 

 petiolate. 



Male. — Black, opaque, very densely and very minutely punctured, 

 thinly clothed with an erect cinereous pubescence; head quadrate; the 

 front depressed; sides of the face and the clypeus bright silvery; man- 

 dible entirely black; antennae black, the scape yellow, with black line 

 at base within; flagellum brownish beneath, with the third to sixth 

 joints produced into a tooth at the apex. Thorax: an interrupted line 

 on the collar, and a spot on the tubercles, pale yellowish; under a very 

 strong lens the punctures on the scutellum run into longitudinal striae ; 

 in one specimen the postscutellum has a narrow, abbreviated yellowish 

 line ; metathorax very densely punctured, transversely and rather in- 

 distinctly striated on the sides, and sometimes with a few longitudinal 

 or slightly oblique elevated lines at the base above; tegulae brownish. 

 Wings uniformly stained with pale fuscous or fuliginous, with a faint 

 coppery or violaceous reflection. Legs simple; the coxae and trochan- 

 ters black ; anterior femora honey-yellow within and above, black ex- 

 teriorly with a yellow line beneath; middle femora yellow within, 

 shading into blackish at base, and a large black mark behind at base; 

 posterior femora sometimes entirely black, but often tinged with honey- 

 yellow at tips, and with a narrow yellow line above; tibiae yellow, with 

 a black line beneath and more or less stained with honey-yellow towards 

 the tips; the four anterior tarsi yellow exteriorly, dusky honey-yellow 

 at tips and beneath; posterior pair dusky honey-yellow, with a blackish 

 line exteriorly. Abdomen subpetiolated, convex, shining, very densely 

 and minutely punctured; basal segment subcorneal, with a pale, small, 

 yellowish-white, transverse spot on each side about the middle ; the five 

 following segments each with pale yellowish or yellowish-white fascia 

 at base, interrupted in the middle on the first three segments, aud 

 entire on the rest; apical margin of the apical segment is sometimes 

 obscure testaceous ; beneath black, smooth and polished, obseurelv 

 testaceous at tip. Length 5 lines; expanse of wings 7 2 lines. 

 Three specimens. 



