6>iZ E. T. CRESSON. 



lowisti-wliite ; apical margin of latter segment reflexed ; the second 

 segment beneath with a yellowish apical margin, and the third with a 

 lateral spot of the same color. Length 4 lines. 



Male. — Like the 9 , except that the clypeus, upper surface of man- 

 dibles, a line between antennae dilated and sub-bilobed above, and the 

 anterior orbits almost filling up the emargination but not extending 

 above it, yellowish-white; the clypeus is smooth and emarginateat tip; 

 the antennae are black above, the scape yellowish-white beneath, the 

 flagellum fulvous beneath, the apical joints gradually thickened, the 

 eleventh joint emarginate beneath, the next suddenly smaller, and the 

 apical joint hooked and subacute ; the lateral spots on first and second 

 segments of abdomen smaller and more oblique ; beneath, the third seg- 

 ment has an entire apical yellowish margin. Length 4 lines. 



One $ , two S specimens. Allied to 0. oculatits Say. Belongs to 

 the subgenus Leionotus. 



25. Pterochilus 5-fasciatus, Say. 



Pterochilus b-faaciatus, Say, Long's Second Exped. iii, p. 347. 

 One 9 , two % specimens. 



26. Pterochilus Lewisii, n. sp. 



Female. — Robust; head and thorax clothed with a pale fulvous pu- 

 bescence ; abdomen silvery sericeous in certain lights ; head black, 

 densely punctured, broad posterior orbits, narrow anterior orbits from 

 the emargination down, the clypeus entirely, and the mandibles, except 

 tips, and the base and lower margin beneath, bright ferruginous; cly- 

 peus subconvex, sparsely punctured, pubescent, the tip produced and 

 truncate ; mandibles large, long, acute at tip, with four obtuse teeth on 

 the inner edge before the tip, the outer surface with two oblique cari- 

 nse, and the lower margin fringed with long yellow hairs ; maxillae 

 blackish, their palpi fulvous, the apical joints fringed with very long 

 hairs; antennae black, the two basal joints bright ferruginous; thorax 

 vei'y densely punctured, black, the upper half of prothorax, spot be- 

 neath anterior wing, two large, almost confluent spots on scutellum, 

 and the sides of the metathorax, bright ferruginous ; postscutellum and 

 tegula3, except a central darker spot, yellowish-ferruginous; metathorax 

 short and very abrupt ; wings subhyaline, varied with fuliginous, the 

 costa and base stained with yellowish, subviolaceous ; legs short and 

 stout, ferruginous, theipoxae and trochanters black, the four posterior 

 tibiae and base of tarsi covered with short spines ; abdomen robust, 

 sessile, very densely punctured ; first and second segments dull ferru- 

 ginous, with their apical margins bright yellow, and a larger black spot 



