No.ikS7. NORTH AMERICAN DIGGER WASPS— FERNALI). 335 



CHLORION (PRIONONYX) STRIATUM (Smith). 



? Pepais j(>h<m)ils Fabkicu's, Syst. Pioz., 1804, p. 208. 

 ? Spher doiuiinri Lepeletier, Hist. Nat. Ins. Hym., Ill, 1845, p. 357. 

 Prionoityx striata Smith, Cat. Ilyiii. Brit. Mus., IV, 1S56, p. 2(56. 

 Sphex {Ilorpactopns) utriatiis Koni-, Ann. natur. llol'nms. Wien, V, 1890, p. 356. 

 "! Spliex {Primioiiyx) hrnna Cameron, Ann. and Mag. Nat. Hist., 6th ser., XIX, 

 1897, p. 370. 



Sphex strlat us Ducke, Zeits. f. Pyst. Ilyni. u. Dipt., I, 1901, p. 241. 



Black, except the abdomen, wliich is pale fei'ruoinou-s; wiiios (hirk 

 fuliginous, with a violet or even ji'ivenish reflection at certain anj:;les; 

 hairs of the bod>' in part dirty white; large, robust insects. 



Female. — Head large, broad, having a squarish oblong outline when 

 viewed from al)ove, the cheeks being quite wide; frons somewhat 

 excavated between the eyes; clypeus large, considerably arched, with 

 an anterior reflexed margin, in the center of which is a notch, above 

 which is a median depression of some considerable depth; surface with 

 lutmerous coarse and many line punctures; more or less dull whitish 

 })ubescent, with numerous long, coarse, black (and a few Avhitish ^) 

 hairs; frons with a pronounced frontal groove; sparsely whitish pubes- 

 cent at the sides; with an elongate, slightly depressed area above 

 each antennal attachment; surface (piite closely, minutely punctured; 

 ocelli inclosed by furrows marking a triangular ocellar area; frontal 

 groove continued behind the anterior ocellus a short distance; top of 

 head some distance behind the ocelli; lateral ocelli about equidistant 

 from each other and from the eyes; vertex minutel}^ punctured, bear- 

 ing line black pubescence and a few long, black hairs; occiput simi- 

 larly clothed, but with quite numerous whitish hairs also; cheeks not 

 quite as wide as the eye, viewed from the side, not narrowing quickl}'^ 

 below, with many long, didl white and black hairs, particularly below; 

 eyes parallel at their inner margins; anteniue l)lack, the lilament gray- 

 ish sericeous; scape black, with short l)lack hairs, particularly at the 

 tip on the inner side; lelative lengths of the filament segments j'g, 2-4, 

 2^1 /11 /«; mandibles black, with a dull ferruginous tinge near the 

 base of the teeth; stout, grooved on the anterior face from the base to 

 near the base of the anterior tooth, with a smaller, longer groove 

 l)eneath, and with long black hairs arising from the anterior groove 

 and the posterior face; the mandible is long, almost reaching the base 

 of its mate. 



Tliora,!-. — Stout, ])lack; top of the neck and lower part of anterior 

 face of the collar with a few minute punctures; glistening; remainder 

 of that face and the dorsal edge whitish pubescent and l)earing a few 

 long, whitish hairs; the dorsal edge evenly rounded; rather closel}' 

 appressed to the mesonotum; sides of the collar and front of the pro- 

 thoracic lol)e with coarse, oblique ridges, finer anteriorly; a Hattish 

 tubercle at the base of the dorsal part of the prothoracic lobe is smooth 



