70 PHYTOPHAGA. 



darker yellow, finely pubeseent ; the breast black, or this colour extending on the abdomen as far as the 

 sides of the segments ; thighs with a faint brown mark in the middle. 



Hah. Guatemala, Capetillo, Duenas (Champion). 



I cannot find any species with which the present one (of which more than half a 

 dozen specimens are before me) agrees. It ought to be placed, without doubt, in the 

 fifth section, near P. gregarius, of Suffrian, and may at once be recognized by the very 

 distinct mark of the thorax. The colour of the underside in these insects does not seem 

 to me to be of much value in their determination, as one before me, which does not 

 differ in other respects, proves. The* principal difference between the present species 

 and P. gregarius lies in the much shorter thorax and the different direction of the elytral 

 striee, which do not enclose a large triangular space near the suture, very plainly 

 visible in P. gregarius. 



17. Pachybrachys cribellatus. 



Pachybrachys cribellatus, Suffr. Monogr. vii. p. 221. 



Hob. Mexico. 



The type in the Berlin Museum (which I have compared) is a female, which 

 may be known from other species by the very close punctuation of the thorax and 

 the sutural parts of the elytra, in connexion with the small general size and pale 

 colour. Some regular rows of punctures are only visible towards the lateral margins of 

 the elytra. 



18. Pachybrachys posticus. 



Pachybrachys posticus, Suffr. Monogr. vii. p. 222. 

 Hob. Mexico, Jalapa. 



Closely allied to the preceding species, but of only half the size, and the smallest 

 species of this genus. The elytra in the only female specimen in the Berlin Museum 

 are still more irregularly punctate, and without any arrangement in rows ; the underside 

 also is black. 



19. Pachybrachys uniformis. 



Black or dark brown below, uniformly light brown above ; head and thorax closely and strongly punctured, the 

 latter with an indistinct black M-shaped mark ; elytra semipunctate-striate at the outer half, with or 

 without a few black spots near the apex. 



Length 2 lines. 



Head light brown, the middle and the vertex more or less black, very closely and more strongly punctured than 

 the lighter parts ; eyes rather distant in both sexes, and but little emarginate ; antennae of half the length of 

 the body, the third joint but little longer than the second, and the fourth joint nearly double as long as 

 the third, black, the basal joint only lighter brown ; thorax distinctly narrowed from the base to the apex, 

 the posterior margin slightly oblique at each side— surface deeply and very closely punctate throughout, 



