20 Mr. H. W. Bates on the Longicom Coleoplera 



I met with a few examples only of this species in the dry 

 woods near Santarem, at the mouth of the Tapajos. 



Genus Xylergates, nov. gen. 



Body oblong, robust. Antennae stout, moderately elongated, 

 sparingly furnished with short bristles beneath. Thorax tuber- 

 cular on the disk ; lateral tubercles large and placed near the 

 middle of the sides. Elytra much broader than the thorax, 

 their deflexed sides broad and vertical, but not separated from 

 the dorsal surface by smooth keels ; surface costate and rough- 

 ened by SDiall tubercles surmounted by short bristles ; apices 

 truncated. Sterna narrow. Terminal abdominal segment in 

 the males with dorsal and ventral plates notched. Ovipositor 

 of the females moderately elongated, conico-tubular ; dorsal 

 plate obtuse, ventral truncated. Legs stout; thighs thickly 

 davate ; fore and middle tarsi dilated in the males ; first joint of 

 the hind tarsi about equal to the two following taken together. 



The robust forms and tubercular thoraces of the species com- 

 posing this genus give them a strong general resemblance to 

 the Acanthoderes ; they are distinguished, however, by the elon- 

 gate gradually thickened basal joint of the antennse, the closure 

 of the anterior acetabular sutures, the ovipositor of the females, 

 and other characters. The genus is very closely related to 

 Eutrypanus, no constant mark of difference existing other than 

 the absence of smooth lateral keels proceeding from the shoul- 

 ders of the elytra. From Acanthocinus it is distinguished by the 

 high vertical sides of the wing-cases, the tuberculose surface of 

 the body, and the dilated anterior and middle tarsi of the males. 



Xyler gates lacteus, n. sp. 



X. oblongus, supra planiusculus, postice seusim attenuatus, brunneo 

 sericeus : elytris strigis curvatis lacteis plagas griseas includentibus, 

 apice sinuato-truncatis, angulis exterioribus productis. Loner. 6i- 

 7 1in. c?$. 



Head tawny brown. Antennse ringed with grey and black. 

 Thorax with large obtusely conical lateral tubercles near the 

 middle of the sides, and with two obtuse tubercles on the fore 

 part of the disk, besides three other smaller ones on the poste- 

 rior part ; surface purplish brown, silky, sides below the tuber- 

 cles ashy. Elytra broad and straight at the base, thence gradu- 

 ally narrowed to the apex, which is somewhat broadly sinuate- 

 truncate, the external angles of the truncature produced ; de- 

 flexed sides (towards the base) thickly granulate -punctate ; sur- 

 face with numerous small punctures towards the base, and with 

 four or five interrupted rows of acute blackish tubercles sur- 

 mounted by short bristles, the middle ones lying along the faint 



