DOKYPHOKA. 243 



The handsomely marked and, for the most part, large-sized species which constitute 

 the present genus are all easily recognized by the peculiar elongation of the meso- 

 sternum, which protrudes in a more or less elongate process between the intermediate 

 pair of legs. The other structural characters are for the most part constant, and offer 

 no great variation, with the exception of the antennae, which vary in shape and size at 

 their terminal joints. 



Of the numerous species, principally described by Stal, twenty are given as inhabitants 

 of Central America ; to this number more than as many again have been added lately, 

 and are included below. 



1. Doryphora paykulli. (Tab. XIV. fig. 16.) 



Doryphora paykulli, Stal, Diagn. 1859, p. 305 ; Monogr. Chrys. Amer. p. 11 \ 



Hab. Mexico \ Panistlahuca (Salle) ; Nicaeagua, Chontales (Belt, Janson). 



In the ten rows of small black spots on the elytra this species resembles several 

 from South America, but differs in the size of the thorax, which is scarcely twice 

 as broad as long. The lateral margin of the elytra is spotless and not produced 

 below the shoulder. Some specimens from Nicaragua differ from the normally 

 coloured ones, with testaceous ground-colour of the elytra, in having these latter almost 

 blood-red. 



2. Doryphora biremis. 



Doryphora biremis, Stal, Diagn. 1858, p. 470; Monogr. Chrys. Amer. p. 22 \ 



Hab. Costa Eica 1 . 



One of the typical specimens from M. Deyrolle's collection is contained in that of 

 Mr. Baly. In its design of the elytra it agrees with D. petulans, but differs in the 

 arrangement of the punctures, which in the present species are more distinctly 

 geminate punctate-striate, the interstices being much broader, while in the allied 

 insect they are covered everywhere with irregular dark punctuation. I cannot call 

 the colour of D. petulans ferruginous, as Stal does; in all the specimens before me, as 

 well as in the present species, the colour is a dark greenish black. 



3. Doryphora glomerata. 



Doryphora glomerata, Stal, Diagn. 1858, p. 253; Monogr. Chrys. Amer. p. 21 \ 

 Hab. Panama, Veragua \ 



4. Doryphora petulans. (Tab. XIV. fig. 15.) 



Doryphora petulans, Stal, Diagn. 1859, p. 305 ; Monogr. Chrys. Amer. p. 22 

 Hab. Costarica 1 ; Nicaeagua, Chontales (Janson; Belt). 

 A somewhat variable species. The elytra are much broader than the thorax (not 



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