160 CURCULIONID^. 



[LeConte. 



18. L. laesicollis Leo., Proc. Ac. Nat. Sc. Pliila., 1858, 78. 



Texas. Beak stout, finely punctured, base, sides and head coarsely 

 punctured ; prothorax very coarsely and tolerably densely cribrate, sides 

 nearly parallel, rounded near the tip, basal impression small. Elytra with 

 deep basal impressions ; striae composed of distant large punctures, tips 

 conjointly subacute, scarcely rounded. 



19. L. macer, n. sp. 



Very elongate, black shining, thinly clothed with fine gray pubescence. 

 Beak longer than prothorax, curved, not stout, punctured ; head sparsely 

 punctured. Prothorax scarcely longer than wide, strongly narrowed in 

 front, feebly rounded on the sides, punctulate, with larger not deep punc- 

 tures, middle of base deeply impressed, base emarginate each side, middle 

 angle prominent, obtuse, rounded at tip. Elytra a little broader than the 

 prothorax, basal impressions deep, striae composed of rather approximate 

 punctures; tips conjointly subacute, slightly rounded. Length 12-19.5 

 mm.; .48-. 77 inch. 



(^. Beak stouter, a little longer than the prothorax, antennae inserted 

 one-third from the tip. 



9 . Beak nearly twice as long as the the prothorax, antennae inserted 

 about the middle. 



Southern and Western States to Colorado and Texas ; not rare. I can- 

 not understand how this species has remained undescribed. It is easily 

 known not only by the large size and elongate form, but by the slender an- 

 tennae; the first and second joints of the funiculus are ecpial, and very long. 

 In some specimens there is a broad, sub-marginal pubescent vitta on the 

 elytra, and in one individual this extends upon the sides of the prothorax. 



SPECIES NOT IDENTIFIED. 



L. marginatus Saj^ Cure. 13; ed. Lee. i, 275; Boh., Sch. Cure, iii, 70. 



L. praepotens Boh., Sch. Cure, iii, 63 ; Rhynchophorus pnepoteris Say, 

 Cure. 21 ; ed. Lee. i, 287. 



L. poricollis Mann., Bull. Mosc. 1843, ii, 291. 



Li. modestus Mann., Bull. Mosc. ibid; L. calif or nicusMotsch., ibid. 

 1843, ii, 378. Perhaps L. pleuralis Lee. (p. 155). 



Tribe V. i;ririiiivini. 



This tribe consists of a great number of species, all of small size, and 

 representing a large number of genera. Most of them are found near 

 water, on plants, and some of them are quite aquatic in tlieir habits. In 

 the beak, prosternum, tibiae and tarsi they differ greatly, so as to permit 

 the recognition of several groups, as will be seen below, but they agree in 

 the following characters : 



Mandibles with three teeth, separated by two cmargiuations, the middle 

 tooth more prominent; in the group DesmorMnes the outer side of the 

 mandibles, by the transposition of the inferior tooth, becomes toothed as 



