CERAMBYCID^; 341 



lower. Length (cf) 20.8 mm.; width 7.7 mm. North Carolina 

 (Southern Pines), Manee laticollis n. sp. 



The female of most of the species seems to be taken much less 

 frequently than the male and I have not seen female examples 

 of either of the last two described above. Acanthocinus linearis 

 Skin. (Ent. News, 1905, p. 290) from southern Arizona, I have not 

 seen; its scheme of ornamentation seems to be radically different 

 and there may be some doubt as to the generic reference. 



The two following genera are rather anomalous Acanthocinids, 

 and they cannot be placed in very satisfactory succession with any 

 of the preceding. 



Dectes Lee. 



This genus is allied in most of its structural characters with 

 Lepturges, but differs completely in general habitus, owing to its 

 long parallel subcylindric form of body, and it differs structurally 

 in its finely faceted eyes, thick tarsi with shorter first joint of the 

 posterior, numerous short erect setae of the elytra and shorter 

 antennae. In the nature and position of the thoracic spines and in 

 the very approximate globular coxae it is purely Lepturgid. It is 

 very widely distributed throughout North America, excepting 

 the Pacific coast regions, and includes numerous species, which 

 because of their uniform vestiture and general similarity of form, 

 have never been studied attentively. Some of the forms described 

 below are undoubtedly true species ; others may prove to be rather 

 subspecies, when the meaning of that expression shall have been 

 definitely determined. They are very uniform in appearance, being 

 cylindrical and densely clothed with short ashy hairs, with short 

 stiff setae arising from the elytral punctures, so that these features 

 will not be mentioned in the following short diagnoses: 



Elytra sharply truncate at apex, the external angle distinct and some- 

 times slightly produced posteriorly 2 



Elytra broadly rounded, sometimes feebly truncate but with the external 

 angle always rounded or indistinct 6 



2 Elytra more elongate, always more than twice as long as wide in both 

 sexes 3 



Elytra shorter, not more than twice as long as wide 4 



3 Middle coxae almost contiguous (cf), narrowly separated (9); 

 body larger in size than in any other species, the elytral humeri 

 never black; antennae similar in the sexes, a fourth longer than the 



