342 [June, 



rne on the naxt species is not natural, as the prssont shews in all its characters 

 the gradual transition. 



43. L. erosa, nigra, supra glabra, capite rufo trisulcato, sulco intermedio 

 interrupto, thorace nigro in^quali canaliculato, elytris flavin, reticulatis, mar* 

 gine postice apice fasciaque angusta ad medium nigris, unguiculis parte inferiore 

 breviore. Long. -8 'll- 



Tegrod?ra erosa Le Conte, Ann. Lye. 5, 1-59. 



San Di'ego-; i July, abundant. Above entirely glabrous, bead riifoiis, rounded, 

 flattened on the disc, sparsely punctured at the sides, d-eeply excavated with 

 three large furrows, tlie lateral ones commencing near the antennoe, and con- 

 verging backwards, the middle one interrupted so as to form two oblong love;i.'. 

 Labrum slightly emarginate, black, with two large red spots, palpi black. An- 

 tennae as long as the head and thorax, cylindrical, third joint not longer than the 

 fourth; eyes transverse, deeply emarginate. Thorax somewhat oval, narrowed 

 in front, obsoletely angled on the sides, disc flattened, marked with a few larue 

 punctures, channeled, broadly impressed anteriorly, foveate each side, broadly 

 excavated at the middle of the base. Scutel black-. Elytra broad, sloping ob- 

 liquely, so that the suture is much higher than usual, dull yellow, coarsely re- 

 ticulate; the intervals between the elevated lines are fuscous behind the middle, 

 where there is a narrow, transverse, black band, the lateral margin behind this 

 band is black, which color becomes broader at the apex, and is gradually nar- 

 rowed again at the su^are. Legs black, tibiae entirely straight, spurs of the 

 posterior tibia? very slender and acute. Claws of the tarsi, with the inferior 

 part one half as long as the upper part, and closely united wiith it at the base. 



C i. 



44. L. segnoentata, nigra, aptera, punctulata, subtiliter dense pubescens, 

 thorace subcampanulato, latitudine vix lon^iore, subcanaliculato, apice et basi 

 cinereo-ciliato, abdominis segmentis postice coxisque cinereo-marginatis, anten- 

 narum articulo 2ndo 3io sesqui breviore. Long. '71. 



lnjtta segrnfiita -Say, Journ. Ac. Nat. Sc. 3, 303. 



Missouri Territory^ abundant. The fent7ale is more robast than the male, 

 and has the elytra gradually moderately dilated posteriorly, but the antennae do 

 not diff'er perceptibly from those of the male. The spurs of the tibiae are slender 

 and acute. I have made -a slight alteration in the name given by Say, to render 

 it grammatical. 



This species seems to connect with the genus Henous HahL The only differ- 

 ence to be found is in the elytra not being connate. I am therefore in doubt 

 about the propriety of continuing Henous as distinct from Lytta. 



Several very large specimens (-95 long) were brought from Texas by Lieut. 

 Haldeman ; at first sight they appear different, th dorsal channel being deeper 

 posteriorly than in ordinary specimens. The thorax seems to be rather broader 

 and more quadrate, but I cannot find any character upcn which to separate them 

 as a distinct species. 



C-^k. 



45. L. o c h r e a, elongata, flavo-testacea, dense liuteo-pubescens, thorace 

 subcampanulato, subtiliter canaliculato, latitudine longiore, antennis nigro-piceis, 

 articulis subconicis, 2ndo 3io vix breviore, palpis piceis. Long. -65. 



One male; New Braunfels, Texas; collected by Mr. Lindheimer. This species 

 is similar in form to the next, but its color is not black but testaceous. The 

 antennae are shorter, being only one third the length of the body ; the joints are 

 conical, not elongate : the first joint is curved and reaches behind the eyes, 

 which are more convex and prominent than in the allied species. 



4G. L. immaculata, nigra, punctulata, dense cinereo vel fulvo-pubescens, 

 thorace subcampanulato, convexo, s>ubcanaliculatt), latitudine non longiore, 

 tarsis antennisque nigris, his articulo 2ndo 3io cequHli. Long. 'Gl -85. 



Say, Journ. Ac. Nat. Sc. 3, 304. 



Lyjtta articularis Say, ibid. 3,304. 



