54 PHYTOPHAGA. 



C. cruentatus are but one species. The only difference, according to Suffrian, is one of 

 coloration, which is very variable in this species, and of which I have nearly all 

 the intermediate stages* before me: the underside is either red or black ; and the elytra 

 vary much in the same respect, sometimes the one, sometimes the other colour pre- 

 dominating. The figures represent Mexican specimens of both Suffrian's species, the 

 types of which I have examined in the Berlin Museum. 



36. Cryptocephalus sordidus. 



Cryptocephalus sordidus, Suffr. Monogr. vii. p. 58 \ 



Fulvous above; head, antennas (the basal joints excepted), and the underside black; thorax finely rugosely 



punctate ; elytra deeply punctate-striate, with two obsolete transverse bands and a spot at the apex 



piceous ; legs fulvous. 

 Length 2-2| lines. 



Hdb. Mexico 1 , Parada (Salle). 



The bands of the elytra in this species are not black in the specimens before me, but 

 brownish and more or less obsolete ; seen under a lens they are still more indistinct, 

 the central one only being plain, while the others appear as isolated spots, thus agreeing 

 generally with the type in the Berlin Museum. 



37. Cryptocephalus salvini. (Tab. IV. fig. 3.) 



Cylindrical, fulvous, shining ; antennae (their basal joints excepted) and legs black ; elytra very finely punctate- 

 striate, with a short transverse subbasilar depression. 



Length 1\ line. 



Head flat, distantly punctured, fulvous, shining ; antennae two thirds the length of the body, slender, the first 

 four joints fulvous, the rest black ; thorax very convex, narrowed from the base to the apex, the posterior 

 margin but slightly sinuate and produced at the middle, posterior angles acute but not much produced, 

 surface perfectly smooth, impunctate and shining, fulvous, with a very slight depression at each side in 

 front of the scutellum ; the latter also fulvous, with a small groove at the base ; elytra very slightly trans- 

 versely depressed below the shoulders, very finely and regularly punctate-striate, the third and fourth and 

 the fifth and eighth striae united at a little distance from the apex, the sixth and seventh row only indi- 

 cated by a few punctures in front of the basal depression, interstices flat and smooth, of the same colour 

 as the thorax, the base very narrowly margined with black; underside and the base of the anterior femora 

 also fulvous ; all the rest of the legs black. 



Eab. Guatemala, near the city (Salvin). 



This new species, of which Mr. Salvin only obtained a single female, approaches in 

 shape and colour to C. perplexus of South America; but it differs in the much finer 

 punctuation and the colour of the legs. 



38. Cryptocephalus obscuripennis. (Tab. III. fig. 11.) 



Light flavous ; antennae (their basal joints excepted) black ; thorax impunctate, fulvous, shining, the margins 

 and two oblique basal spots flavous ; elytra moderately deeply punctured, with the inner three pairs of 

 striae united at their apex, each elytron with six very obscure flavous spots. 



Length 2 lines. 



