102 TIIK lANAlHAN KNToMoI.lMilST. 



iccih. NoriU Catoima. (This species is also found in Pennsylvania. — 

 Uc.)" 



'Die females are readily distinguished from those of the allied species 

 by the granulations of the caudal half of the pronotum and the teeth of the 

 dcclivital irUersi)aces. i'he pronotum appears almost square from above, 

 and the entire disk is rough, with large llaticned spines in front, reduced 

 to small flattened granules behind. The elytra are ly^ times as long as 

 the |)ronolum ; sides straight to beyond the bend of the declivity ; sutural 

 striii" more strongly impressed, particularly on the declivity ; second and 

 third interspaces wider on the declivity and each bearing three or four 

 acute denticles, those of the second larger ; the outer interspaces each 

 with a few acute granules. I have not seen males of this species. 



I have never seen a specimen which I could reconcile with Dr. 

 LeConte's description of obesus, quoted below. Apparently it has the 

 general characters oi dispar, about the same length, 3 mm., but a much 

 stouter form and more widely-spaced elytral punctures. It cannot be the 

 form here described as serratus — the teeth of the declivital ridge in 

 serratus ( 9 ) are very distinct. It may be a large variety of the form here 

 described as minor ; that can only be determined by an examination of 

 the type. Jt cannot, of course, be the male of dis/>ar, for the length given 

 for obesus is entirely too great. 



Original description of A', obesus Lee. (Le('onte, Trans. .Vm. Knt. 

 Soc, 1868, page 159): "X obesus. — Short and stout, cylindrical, 

 blackish brown, thinly cloihed with long, soft, erect pale hairs, antenna' 

 reddish brown ; head ccjnvex, coarsely but not densely punctured ; pro- 

 thorax rather broader than long, strongly roughened with subacute 

 tubercles in front, nearly smooth behind ; elytra with rows of large 

 punctures, not very closely set, intervals flat, marked with small distant 

 punctures, from which proceed the long hairs ; tip obliquely declivous, 

 not tuberculate, but with the stri;e somewhat impressed, and the side and 

 lip acutely margined, as in the two preceding species. Long, 3 mm. 



X'irginia, .Massachusetts and f'anada. Differs from the two preceding 

 l)y its much stouter form and by the absence of the small acute tubercles 

 of the declivous lip of the elytra." 



Xyleborus serratus, n. sp. — Female : Length, l%-},]'-i mm.; width, 

 >J<3-''-' "^"^- Black, and sparsely clothed with lung, slender grayish 

 hairs, which are shorter on the disk of the pronotum. It is closely allied 

 to dispar ( 9* ). but differs in the following characters : It is larger and 



