DISONTCHA. 307 



The head in this species is of the same colour and sculpture as in I), nigripes; the 

 carina is, however, wider, not so acutely raised, and still more dilated at the clypeus ; 

 the antennae have the fourth joint much longer than the third; and the legs and 

 underside are entirely flavous, with the exception of the apex of the tibiae and the 

 tarsi, which (as is usual) are black. The insect is also closely allied to D. eximia, but 

 the antennae are quite different and much more slender, and the colour of the elytra is 

 also totally different. It is of course possible that the present species is but a variety 

 of D. nigripes ; but as the ten specimens under examination all agree in the above 

 particulars, I must consider them to represent another species. Two specimens from 

 Nicaragua agree in all essential characters with the type, except in the more or less 

 black vertex of the head ; the impunctate elytra, however, prevent my looking upon 

 these specimens as varieties of D. collata. 



6. Disonycha subaenea. (Tab. XVIII. fig. 13.) 



Testaceous; antennae black, the three basal joints testaceous below; disk of the elytra brownish or greenish 

 aeneous, closely subrugose-punctate. 



Length 3^-4 lines. 



Head impunctate, the vertex sometimes obscure piceous ; frontal tubercles flattened, transverse ; carina swollen 

 and much widened in front ; antennae shorter than half the length of the body, slender, not thickened at 

 the terminal joints, fourth joint distinctly longer than the third ; thorax narrdwed in front, sides with a 

 flattened margin, which is rather broad in front of the anterior angles ; surface impunctate, the basilar groove 

 scarcely visible; scutellum black; elytra rather flattened, closely and somewhat rugosely punctured, 

 seneous, the lateral margin broadly testaceous. Underside and legs testaceous ; the apex of the posterior 

 femora, that of all the tibiae and the tarsi piceous. 



Hah. Mexico, Oaxaca (Hoge), Juquila (JBoucard, coll. Salle). 



At first sight the species here described resembles D. discoidea, Fabr. ; it is, however, 

 larger, the colour of the disk of the elytra is bronze, not black, and the punctuation 

 much stronger. The same differences as well as the testaceous colour of the elytral 

 epipleura separate the species from D. dorsata. In one or two specimens there is just 

 an indication of a narrow lateral elytral stripe. 



7. Disonycha apicalis. (Tab. XVIII. fig. 16.) 



Testaceous; breast black; four terminal joints of antennae fuseous; head and elytra greenish black, the latter 

 closely punctured, their apex testaceous. 



Length 3 lines. 



Head impunctate, with a distinct longitudinal groove between the eyes, and a fovea in front of their inner 

 margin ; frontal tubercles very broad, but fiat ; carina acutely raised ; antennas half the length of the body, 

 testaceous, the last four joints fuscous, the first three basal ones spotted obscurely with piceous above ; fourth 

 joint longer than the third ; thorax of equal width, the basilar groove scarcely visible ; sides narrowly 

 margined, slightly rounded, posterior angles oblique ; surface entirely impunctate, testaceous ; scutellum 

 of the same colour ; elytra metallic greenish black, finely and closely punctured, the apex of each elytron 

 testaceous, forming a triangular-shaped spot ; legs and abdomen testaceous ; tarsi spotted or edged with 

 piceous, which colour is also indicated at the middle of the abdominal segments. 



Hah. Mexico, Orizaba (SallS). 



Of this very distinctly marked species, a single specimen only is before me. 



2r2 



