PACHTBEACHYS. 71 



light brown, with a more or less distinct M-shaped black mark ; scutellum black ; elytra semiregularly 

 punctate-striate at tbeir outer half, irregularly punctured towards the suture, each elytron with two rather 

 distinct and slightly raised interstices from the base to the apex, the others flat and more irregular — a spot 

 at the shoulder, and three others at some distance from the apex, in some specimens obsolete or wanting, 

 black ; underside fine silvery pubescent ; thighs with a black central spot, extending nearly to the end of 

 the body in the male. 



Hah. Guatemala, near the city {Champion). 



This is a closely allied species to P. cribellatus, distinguished by the larger size, the 

 black underside and antennae, and the semidistinct, smooth, longitudinal costse of the 

 elytra ; the latter are also dark brown, instead of light yellow. 



20. Pachybrachys hepaticus. 



Pachybrachys hepaticus, Melsh. Proc. Ac. Phil. iii. p. 171 1 -, Suffr. Monogr. vii. p. 223 2 . 

 Pachybrachys punctatus, Hald. Journ. Ac. Phil. ser. 2, iv. p. 257 3 . 



Eab. Noeth Ameeica, Pennsylvania 1 3 .— Mexico, Jalapa 2 , Vera Cruz (Salle); Gua- 

 temala, Duenas, Capetillo (Champion). 



The specimens collected by Mr. Champion agree very nearly with the type in the 

 Berlin Museum, except that they are more robust and more distinctly marked ; in other 

 respects I see no material difference. 



21. Pachybrachys pinguis. 



Pachybrachys pinguis, Suffr. Monogr. vii. p. 225. 

 Hob. Mexico. 



Resembles very much P. hepaticus, but is a little smaller and more evenly punctured 

 throughout the entire surface ; the elongate light patch at the hinder half of the 

 elytra occupies here the entire apex; head and legs darker. I have also compared 

 this type in the Berlin Museum. 



22. Pachybrachys bifasciatus. (Tab. IV. fig. 17.) 



Below black and yellow ; thorax fulvous, the margins and a central spot on the disk yellow ; elytra semi- 

 regularly punctate-striate, yellow, an interrupted transverse band at the base and another narrower one 

 below the middle black. 



Length 1| line. 



Head yellow, the base and a central line brown ; eyes closely approached ; antennae very thin and slender, 

 extending to one third the length of the body, the first six joints testaceous, the rest black ; thorax very 

 narrow, of nearly equal width and with a distinct transverse groove at each side near the base — surface 

 deeply but remotely punctured, fulvous, all the margins and a central more or less distinct spot bright 

 yellow ; scutellum yellow or black ; elytra with distinct but posteriorly abbreviated punctured stride, which 

 run as follows : — an oblique closely approached, pair below the scutellum towards the suture, the outer 

 row of which is connected with the third row at its apex, and enclosing a widened smooth space ; the 

 fourth and fifth rows nearly parallel, but shorter than the preceding and following ones, and also united 

 at their apex ; the interstices mostly raised in smooth spaces of unequal size, the black-coloured portions 



