LeConte.] 



cryptoiihy:n^chini. 227 



at the base of the third interspace is a conspicuous white spot. Ventral seg- 

 ments coarsely and tolerably densely punctured; fifth more densely, a little 

 less coarsely. Thighs annulated, bidentate. Length 4.7 mm.; .19 inch. 

 Southern States, Georgia to Texas; four specimens. 



3. O. nenuphar Harris, Ins. Inj. to Veg. 1st ed. p. 67 : 3d ed. p. 75 : 

 Bhynchcenus neii. Herbst, Kafer, vii, 29, pi. 99. f. 8 : Rhynchcenus argula 

 Fabr., Syst. El. ii, 467; Oliv., Ent. No. 83, 192, pi. xxii, f. 301 : Rhynch- 

 cerasi Peck, Mass. Agr. Repos. 1819, 307. Conotrachelm arg. Fahrieus, 

 Sch. Cure. iv. 425. 



Found over the Atlantic slope, wherever the plum is cultivated or native. 

 It attacks also other stone fruit, and is said to infest apples, pears and 

 quinces (Harris loc. cit). Further observations on this point are desirable, as 

 it is very unlikely that such different plants are attacked by the same species. 

 The crests of the elytra are more abrupt, and the posterior ones more promi- 

 nent than in the two preceding; the second elevation of the fifth interspace in 

 front of the middle is conspicuously smaller than that of the third inter- 

 space, and does not overlap it as much as in C. juglandis. The elytral band 

 is composed of yellow and white hair; there is a conspicuous white line at 

 the base of the third interspace. The thorax is longer and less rounded on 

 the sides, than in the two preceding. The beak is stout, curved, and 

 strongly striate and punctured; the ventral segments coarsely and densely 

 punctured; fifth with two setigerous tubercles; I have many specimens 

 before me, which show no variation worthy of note. 



An excellent memoir on this pernicious insect by the late B. D. Walsh 

 will be found in the Practical Entomologist, ii, 75; and some additional re- 

 marks in the First Annual Report of the State Entomologist of Illinois, 1868, 

 p. 64. 



4. C. retentus Boh., Sch. Cure, iv, 442, (retensus err. typ.); Crypto- 

 rhyncTius retentus Say, Cure. 27; ed. Lee. i, 295. 



Kansas; one specimen, Mr. Popince. A large species of nearly black 

 color, clothed nearly uniformly with short, dark gray pubescence. The 

 beak is long, slightly curved, strongly striate and punctured. The protho- 

 rax is densely rugosely punctured, with a small median callus, and some 

 indistinct tubercles; each side is a vague curved line of pubescence; the 

 sides are much rounded, and strongly constricted in front. The elytra are 

 striate with distant quadrate punctures, the alternate interspaces are mod- 

 erately carinated, the third and fifth ai"e each interrupted twice, and the 

 seventh broadly interrupted behind the humerus. Ventral segments 

 sparsely punctured; fifth more densely and finely punctured. The thighs 

 are distinctly bidentate. Length 7 mm.; .28 inch. 



5. O. seniculus, n. sp. 



Beak short, stout, curved, strongly punctured and striate, as in C. 

 nenuphar. The prothorax is wider than long, constricted in front, rounded 

 on the sides, strongly rugosely punctured, and very distinctly carinate 

 from the tip nearly to the base; each side is a straight, oblique line of 



