LeConte,] 



CRYPTORHYKCHINI. 237 



first joint stouter and elongated, the others are short, closely Connected, so as 

 to appear indistinct, and gradually pass into the club, which is elongate 

 oval, in one species, and elongate ovate and obtuse in the second; the 

 number of short joints under a high power is six, and they do not differ in 

 length, but gradually increase in thickness. The beak is as long as the head 

 and prothorax, slightly curved, stouter in one species (sex ?) than in the 

 other. Prothorax gradually narrowed from the base forwards, strongly 

 constricted and tubular at tip, without postocular lobes, not emarginate be- 

 neath ; the base is strongly sinuate and margined, scutellar lobe acute. Elytra 

 ample, convex, a little wider than the prothorax at base, gradually nar- 

 rowed behind from the humeri which are rather prominent. Pectoral 

 groove shallow, antecoxal ridges very fine; prosternum prominent and fo- 

 veate behind the front coxae which are moderately distant; mesostemum 

 short, declivous, not prominent, middle and hind coxae widely separated. 

 Ventral segments, first and second very large, connate, with the suture ob- 

 literated at the middle; third and fourth short, sutures deep, nearly straight ; 

 fifth as long as third and fourth united, rounded behind, flat. Legs rather 

 short, slender, thighs unarmed, tibiae slightly mucronate at tip, tarsi with 

 the third joint emarginate, not broader than the preceding; last joint as 

 long as the others united; claws slender, divergent, not toothed. 



1. Z. sulcatus, n. sp. 



Dark reddish brown; head and tubular constriction of prothorax smooth, 

 beak deeply sulcate each side; prothorax very coarsely cribrate, sparsely 

 pilose with long, erect whitish hairs. Elytra deeply sulcate, grooves punc- 

 tured, interspaces narrow, convex, each with a row of distant, small punc- 

 tures, from which proceed long, erect hairs; disc from base to behind the 

 middle red. Trunk and first ventral segment with very large, sparse punc- 

 tures. Length 1.8 mm. ; .07 inch. 



One specimen from Mobile, Alabama, given me by the late Col. Mot- 

 schulsky, under the MS. naiue Nanophyes rubidus. 



2. Z. striatus, n. sp. 



Of the same form and sculpture as the preceding, somewhat lighter in 

 color. Beak more slender (a sexual character?), less deeply sulcate, with 

 two or three long hairs each side near the base. Prothorax with more nu- 

 merous erect hairs. Elytra with coarsely punctured shallow stri;T?, inter- 

 spaces wide, flat, each with a series of long, pale, erect hairs proceeding 

 from scarcely perceptible punctures. Length 1.8 mm.; .07 inch. 



One specimen, Pennsylvania; Mr. S. ^. Rathvon. The essential differ- 

 ence between this and the preceding is in the elytral sculpture. The other 

 characters are dependent on sex, and on better preservation of the speci- 

 men. 



MICROHYUS n. g. 



As the preceding genus resembles Rhyssematus in miniature, so does this 

 resemble the smaller, setose Conotracheli, but differs cliiefly in tlie funicu- 

 lus of the antennae and the simple, divergent claws. The beak is shorter 

 than the prothorax, nearly straight, with the antennae inserted about one- 



