CERAMBYCIDJE 25 1 



tibiae of the male are sinuate on the outer edge just behind the 

 middle, and thence broader and parallel to the apex, the inner face 

 being irregularly impressed almost throughout. In the male of 

 quadrittum this tibial character is almost similar, except that the 

 outer sinus is broader, less deep and medial, instead of well behind 

 the middle as it is in convolvens. This species has been confounded 

 with Pachyta vexatrix Mann., described from the Kenai Peninsula 

 of Alaska; the two are very different, as may be seen at once on 

 reading Mannerheim's ample description. 



Brachyleptura n. gen. 



The sexual differences in this genus do not seem to affect the 

 tibiae, but in general bodily facies become extreme in certain species, 

 such as Icetifica Lee., where the much stouter female has scarlet 

 elytra, each bimaculate with small black spots and the male is 

 smaller, much more slender and entirely black, the elytra rarely 

 being red about the humeri and in a small discal spot near the 

 apex, or in the antennal structure of lacustris, where the male 

 antennae are long and subserrate and those of the female very 

 short, more slender and not in the least serrate. The elytral punc- 

 tures are often serial in arrangement in part, as in vagans and 

 rubrica. The genus is a compact and isolated group of species, 

 not closely related to any others and comprises rubrica Say, vagans 

 and circumdata of Olivier, canadensis Fabr., cribripennis* dehiscens, 

 Icetifica and sanguinea of LeConte and lacustris and haldemani of 

 the present writer. In addition to these the following may be 

 included: 



Brachyleptura subquadrata n. sp. General form and coloration of 

 the body, legs and antennae as in circumdata but very much stouter; 



* Canadensis and cribripennis form a rather isolated group of the genus, owing to 

 the broader and deeper gutter demarcating the very strong apical bead of the pro- 

 thorax, this having in fact more the appearance of a true constriction than is observable 

 elsewhere in Brachyleptura, and in the more appendiculate last antennal joint of the 

 male. That they belong here, though, is plainly shown by the general form of the body, 

 particolored and serriform antennal joints, type of sculpture and ornamentation, typ- 

 ically variable coloration of the elytra and type of male sexual characters, which all 

 harmonize thoroughly with other members of Brachyleptura. These two forms are 

 truly valid species and not connected in any way subspecifically. The male antennae 

 of canadensis, for instance, are invariably deep black throughout, while in cribripennis 

 the joints are bicolored as in the female; canadensis also is much smaller, opaque and 

 not strongly shining, less coarsely sculptured and more constant in coloration. 



