CERAMBYCID^E 269 



punctate prothorax, but the elytra are pale reddish or yellowish 

 brown, with the apices black; the pubescence is fine, rather long, 

 erect and distinct on the anterior parts, short, inclined and sparse 

 on the elytra; they may be distinguished as follows: 



Elytral punctures close-set throughout and especially on the flanks, 

 where they are subcontiguous; body stouter and larger, the black 

 apical area of the elytra not ascending at the sides. Male only 

 moderately narrower and with more cuneiform elytra than the 

 female and much more closely punctate; fifth ventral segment 

 remarkably modified, broadly arcuato-truncate at apex, with an 

 acute sharp incision, triangular in form, deeper than wide and ex- 

 tending almost to the base of the segment. Female with the ridge 

 of the last dorsal segment horizontal along its summit to the extreme 

 apex, often turned upward and very prominent at tip; abdomen finely, 

 feebly and not densely punctate. Length (c? 9 ) 13.0-16.8 mm.; 

 width 4.4-6.0 mm. Pennsylvania to Wisconsin (Bayfield). 



proxima Say 



Elytral punctures not quite so coarse and everywhere distinctly separated, 

 black of the elytral apices ascending at the sides. Male smaller 

 and narrower than in proxima, with the elytra more rapidly cunei- 

 form and relatively much more acutely rounded at apex, the narrow 

 truncatures similar, otherwise nearly as in proxima, except that the 

 sides of the prothorax are not so strongly angulated and the antennae 

 a little shorter; fifth ventral segment differing profoundly, being 

 evenly truncate at apex and without trace of sinus or incisure; 

 abdomen still more densely punctulate. Female not at hand. 

 Length (cf) 11.7-12.5 mm.; width 4.0-4.2 mm. Wisconsin (Bay- 

 field), Wickham minnesotana n. sp. 



That two forms, resembling each other so closely and occurring in 

 the same locality, should differ so radically in male sexual characters 

 as to render any other assumption than that of a truly specific 

 status quite untenable, is most remarkable; the condition exists, 

 however, in many other parts of the Coleoptera, such as Reichen- 

 bachius and Lachnosterna, and serves to point a moral against such 

 hasty verdicts concerning specific identity as seem to be the fashion 

 in many quarters. 



Group IV. 

 Subgenus Dorcasina nov. 



The coloration and style of ornamentation are as constant 

 through the four species of this subgenus as among the members of 

 the preceding group, the body, legs and antennae being pale, the 

 elytra each with a cloud-like rounded black spot externally near 



