CLARENCE E. MICKEL 425 



In Fox's table it runs out at hilaris, but differs from any of the 

 species in that group by the lack of a spur on the intermediate 

 tibiae, antennal characters, the sculpture of the propodeum and 

 other minor characters. 



Crabro (Protothyreopus) crassiceps sp. nov. 



9 . Length 13.5 mm. Anterior margin of clypeus .slightly rounded out, 

 nof dentate laterally; head rather finely and evenly punctured throughout; line 

 from anterior ocellus rather indistinct; ocelli in a low triangle, the space be- 

 tween the posterior pair slightly less than that between one of them and the 

 nearest eye margin; facial basin smooth; first joint of the flagellum about 

 equal in length to the following two joints united; clypeus, frontal orl)its widely 

 and posterior orbits densely silvery pubescent; remainder of head with short, 

 sparse pubescence, except on the vertex before the ocelli where the pubescence 

 is rather long (about as long as the first flagellar joint); pronotum strongly 

 ridged anteriorly, very slightly dentate laterally, strongly emarginate medially; 

 anterior face of pronotum longitudinally striated; mesoscutum and meso- 

 scutellum with moderate, close, more or less confluent punctures; episterna 

 strongh", transverselj^ striated above, striato-punctate below; mesosternum 

 with large, sparse punctures; propodeum obliquelj^ striate above, channelled 

 medially, the channel rather narrow; sides of propodeum very finely trans- 

 versely striate; posterior face of propodeum more strongly, transversely striate 

 than the sides, with a rather deep channel medially; entire thorax with sparse, 

 fairly long, silvery pubescence; dorsal abdominal segments finely, closely 

 punctured, the punctures on the first segment slightly larger than those on 

 the following segments; pygidium flat, triangular, with a lateral fringe of stiff 

 hairs; second and third ventral segments with finely, closely punctured areas 

 laterally; the second ventral segment sparsely punctate throughout; sternites 

 two to five with an apical, transverse line of rather large punctures; sternite 

 six strongly punctured; all the femora more or less triangular, the anterior 

 ones strongly so. Color black; mandibles (except apices), scape entirely, 

 pcdicellum and first joint of flagellum beneath, pronotum above except the 

 emargination, posterior lobes of pronotum, tegulae anteriorly, large rectangu- 

 lar spot on the episterna just behind the posterior lobes of pronotum, two 

 small lateral spots in front of the mesoscutellum, a narrow band on the meso- 

 scutellum anteriorly, interrupted medially, metanotum, two lateral, irregularly 

 triangular spots on the lower portion of the posterior face of the propodeum, 

 two large spots on first abdominal tergite almost touching medially, broad 

 bands, slighth^ narrowed medially on abdominal tergites two to five, that on 

 tergite five the widest, spot on the posterior coxae beneath, all th.e femora above 

 at the apex and extending about two-thirds of the way to the base, all the 

 tibiae entireh^ and the basal two or three joints of all the tarsi, yellow; pos- 

 terior portion of tegulae testaceous; apical joints of tarsi blackish ; wings slightly 

 yellowish; nervures and stigma yellowish; first recurrent nervure received near 

 the apex of the first submarginal cell. 



cf. Unknown. 



TRANS. AM. ENT. SOC, XLII. 



