North American Rhyncliophora. 273 



Prothorax widest just before the middle; sides strongly rounded, thence 

 convergent and nearly straight to the base, strongly constricted near 

 the apex; base and apex transversely truncate, nearly equal, the former 

 sinuate in the middle; disk before the middle distinctly wider than the 

 head, slightly wider than long, narrowly and feebly grooved along the 

 middle from near the apex to the base; surface convex, finely, feebly, 

 and densely ruguloso-punctate, with a few fine, elongate, squamiform 

 hairs along the basal margin and on the sides anteriorly. Elytra 

 elongate-oval, one-half longer than wide, nearly twice as wide as the 

 prothorax; humeri broadly rounded; sides very feebly arcuate; base 

 truncate; disk convex, very broadly, feebly, and indefinitely striate, 

 having ill-defined rows of very sparsely scattered, excessively minute 

 and scarcely discernible setae. Legs and under surface with very 

 minute, erect, white setse. Legs and antennae rufous, body black. 

 Length 4.0 mm. 



Arizona (Yuma). Mr. G. W. Dunn. 



Found in very limited numbers. The apical margin of the 

 prothorax behind the eyes has a few long erect vibrissse, and, in 

 addition, a dense row of broad scales which overlap. The sides 

 of the head are slightly tuberculate above the eyes. The fourth 

 tarsal joint is relatively longer, and the third more widely dilated 

 than in laticeps. 



P*EIJDEL<1SSA n. gen. (Tanymecini). 



Beak short, very slightly narrowed toward tip; scrobes lateral, rather 

 long, strongly angulate at anterior third, beginning at the apex, narrow^ 

 and deep throughout, apical portion parallel, then descending obliquely 

 and terminating just below the anterior limits of the eyes. Antennae 

 moderate, subapical; scape slender, feebly clavate, extending nearly to 

 the middle of the eye, but slightly shorter than the funicle; basal joint 

 of the latter slightly more robust, as long as the next two together, 

 second as long as the third and fourth combined, joints three to seven 

 subequal, the latter slightly wider than long; club elongate, ovoidal, 

 pointed, finely pubescent. Eyes small, rounded, slightly prominent, 

 nearly in contact with the prothorax. The prothorax subcylindrical, 

 without ocular lobes and almost completely devoid of vibrissas. Scu- 

 tellum scarcely entering the ely tral disk. Elytra elongate-oval; humeri 

 rounded. Legs moderate; tarsi short, basal joints short, subequal, 

 third scarcely perceptibly wider than the second, deeply emarginate, 

 fourth as long as the three preceding together. Anterior coxae contig- 

 uous; posterior small, at the sides of the body, very widely separated. 

 First abdominal suture broadly and distinctly angulate; second segment 

 distinctly longer than the third and fourth combined. 



