LeOonte.] CRYPTORHYNCHINI. 233 



17. C. cribricollis Cryptortiynchuscribr. Say, Cure. 28; ed. Lec.i, 296: 

 Boh., Sch. Cure, iv, 446. 



New York, Louisiana, Texas. Also of the same form and size, but with 

 the sculpture of the prothorax much coarser, so that the surface appears 

 reticulate; the pubescence of the elytra is coarser, and the bristles longer 

 and more numerous. The punctures of the striae are large, quadrate and 

 approximate, and the interspaces slightly convex. Body beneath coarsely 

 and densely punctured, last ventral segment not impressed; thighs acutely 

 toothed. 



18. O. plagiatus, n. sp. 



Black, variegated with ferruginous pubescence, elytra in great part, and 

 metasternum densely clothed with small, white scales. Beak as long as 

 head and prothorax, stout, curved, punctured and pubescent, feebly striate. 

 Prothorax as long as wide, rounded on the sides, narrowed, but scarcely 

 constricted at tip, coarsely but not densely cribrate, not carinate, mottled 

 with ferruginous and white spots. Elytra one-half wider than prothorax at 

 base, humeri abruptly rounded, disc convex, striae composed of large punc- 

 tures, interspaces nearly flat; an irregular humeral patch, and a very broad 

 band about the middle, not extending to the suture, and the sides from the 

 base to behind the middle are white; rest of the surface mottled, ferruginous 

 and white. Metasternum white, abdomen with lateral spots of denser 

 pubescence; under surface very sparsely cribrate- punctate, punctures very 

 few on the ventral segments 1-4; fifth finely and densely punctured, with a 

 large, shallow circular impression. Legs annulated; thighs armed with an 

 obtuse tooth, and a feeble trace of a denticle; mesosternum not protuberant. 

 Length 4 mm. ; .16 inch. 



Texas, Belfrage; one specimen. 



DIVISION II. Sp. 19-21. 



In this division the form is rather squat, the elytra at base being nearly 

 twice as wide as the prothorax; the latter is coarsely sculptured, and has 

 two crests in front of the middle, between which is a wide furrow. The 

 beak is curved, a little longer than the head and prothorax, strongly punc- 

 tured and striate. The alternate interspaces of the elytra are strongly cari- 

 nated, and sometimes abruptly interrupted. The under surface is very 

 coarsely punctured; the mesosternum horizontal and protuberant in front; 

 the legs are annulated; the thighs armed with a large tooth and a small 

 denticle. 

 Three species are known to me, which may be tabulated as follows : 



Elytral costae entire, or nearly so 2. 



" " abruptly interrupted 19. tuberosus. 



2. Elytra mottled, strongly costate 2O. anaglypticus. 



" in great part white, feebly costate 21. leucophssatus. 



19. O. tuberosus, n. sp. 



At first sight this species resembles closely C. nenuphar, but it is smaller 

 and stouter, and the sculpture of the prothorax is very different. The 



PROC. AMER. PHILOS. SOC. XV. 96. 2D 



