[27] NORTH AMERICAN COLEOPTERA. 183 



ever, attached to that group to which it is probably most 

 closely allied. Nisa includes but two species, luniger Lec- 

 and cavicornis Brend. 



Keichenbachia Leach. — By direct comparison with Euro- 

 pean representatives there is no apparent difference in the 

 American forms. 



Nisaxis n. gen. — Here the species are decidedly more mi- 

 nute than in any of the other genera of this group, and are 

 probably more abundant than hitherto supposed. It is 

 very distinct in its cephalic characters, as well as those of 

 the pronotum and sexual modifications. The discal striae of 

 the elytra are usually shorter than in the other genera, and 

 the basal carina? of the first dorsal segment short and widely 

 distant. At present it can include only tomentosa Aube. 3 



BRYAXIS Leach. 



The more salient characters separating Bryaxis from the 

 other genera here noted, besides the sexual modifications 

 already mentioned, are the comparatively large size, more 

 distinct abdominal border, the pronotal fovea? and the very 

 large eyes situated almost at the extreme base of the head. 



B. texana u. sp. — Form rather slender, pale rufotestaceous throughout; 

 legs concolorous; antennae aud abdomen very slightly darker; integuments 

 polished; pubescence very short, suberect, not dense. Head rather small; 

 eyes very large, prominent, situated very close to the basal angles, more con- 

 vex posteriorly; base broadly truncate; surface feebly convex, impunctate, 

 occipital foveas situated on a line through the anterior portion of the eyes, 

 moderate, rather deeply impressed, mutually more than three times as dis- 

 tant as either from the eye; apical fovea very slightly smaller, more broadly 

 impressed at the sides; apical angles very slightly rounded; antenna? rather 

 slender, distinctly longer than the head and prothorax together, club rather 



3 The species described by me (Cont.I, p. 33) as inopia, has been considered 

 a synonym of this species in the recently published Check List of North 

 American Coleoptera. As inopia has two well-developed occipital fovea?, it 

 cannot be placed in the neighborhood of tomentosa. If the compilers of the 

 catalogue are determined to regard it as a synonyu:, some more appropriate 

 species should be selected with which to combine it; it belongs near rubi- 

 cunda, although somewhat resembling tomentosa. 



