1853.] 343 



Missouri Territory, Creek Boundary and Texas. Say has given no character 

 for separating his two species, but suggests that they may be varieties. If he had 

 possessed the next species, he would immediately iiave observed the difference in 

 the form of the thorax. In the female the antennae are but little longer than the 

 head and thorax, very slender and setaceous, the first joint reaching to the pos- 

 terior margin of the eyes. In the ma?e the same organs are half as long as the 

 body and much stouter, though setaceous ; their first joint reaches beyond the 

 eye. 



47. L. longicollis, nigra puRctulata, dense cinereo, vel luteo-griseo pu- 

 bescens, thorace subcampanulato, potice canaliculato, latitudine sesqui longiore, 

 eiytris macula humerali parva denudata, genubus tarsis antennisque nigris, his 

 articulo 2ndo 3io subbreviore. Long. -9. 



Missouri Territory and Santa Fe. This species is a little more slender than 

 the last, which it closely resembles; the elongate form of the thorax and the 

 small denuded humeral spot at once distinguish it. The antennae in the female 

 are one third the length of the body and setaceous, the first joint reaching a little 

 behind the eyes which are much narrower than in the preceding. In the male 

 the antennae are more than half the length of the body and stouter than in the 

 female ; the first joint extends beyond the base of the head. 



48. L. tenuis, valde elongata, nigra, dense cinereo-pubesccns, thorace sub- 

 campanulato, canaliculato, latitudine fere sesqui longiore, tarsis antenni>que ni- 

 gris, his articulo 2ndo sequentibus tribus oequali, palpis pallidis. Long. '62. 



One male; Georgia. This species is easily distinguished from the next by the 

 pale palpi and the very long second joint of the antennce; these organs are two 

 thirds the length of the bo;iy ; the first joint extends to the base of the head. 

 This would be C. unicolor Kirby, were it not for the pale palpi. 



49. L. Fabricii, valde elongata, nigra, dense cinereo-pubescens, thorace 

 subcampanulato, canaliculato, latitudine longiore, tarsis palpis antennisque nigris, 

 his articulo 2ndo 3io longiore. Long. '45 .55. 



1 Lytta cinerea \\ Fabr. Ent. Syst. Suppl. 119 ; Syst. El. 2, SO. 



Cantharis cinerea Harris, Ins. Injurious to Vegetation, 122 : Bost. Journ. Nat. 

 Hist. 1, 497. 



Atlantic States and jNIissouri Territory ; abundant. The antennae in both sexes 

 are half the length of the body ; in the female the first joint reaches behind the 

 eye, and the second joint is one half longer than the third, in the male they are 

 thicker, the first joint reaching to the base of the head, and the second joint is 

 twice as long as the third. Fabricius' description is worthless, and his name 

 pre-occupied by Forster. C sericea Olivier, quoted by Fabricius as synonymous, 

 is described as having the antennae short, and as being found in Barbary. 



One small male (-3 unc. long) from Missouri Territory, differs in having 

 shorter and stouter antennae, the intermediate joints being scarcely one half 

 longer than wide, the first only reaches half the distance between the eye and 

 the back of the head ; a female from the same locality also differs from the type 

 in having less slender antennae ; these may probably belong to a different species, 

 but as these characters seems light, I forbear naming it for the present. 



50. L. tors a, valde elongata, sat dense tenuiter cinereo pubescens, thorace 

 subcampanulato latitudine non longiore, canaliculato, tarsis palpis antennisque 

 nigris, his articulo 2ndo longiore, sequentibus subobconicis. Long. '45. 



One male from Texas ; Lieut. Haldeman. In specific characters this comes 

 very near to the next species, but the pubescence is more abundant, and the 

 punctuation of the elytra much finer. The sexual characters are very remark- 

 able ; the first joint of the antennae is as long as the head, thickened,- and sud- 

 denly bent at an obtuse angle about the middle, and then slightly curved out- 

 ward towards the tip ; the second joint is nearly as long as the three following, 

 which are triangular; the following joints are gradually narrower to the ex- 

 tremity. 



From the differences noted under the other allied species, it is probable that 

 many closely related species are found in different parts of the country, the spe 



