444 PHYTOPHAGA. 



21. Allochroma puncticolle. 



Broadly oblong-ovate, obscure testaceous, glabrous ; the sixth to the tenth joints of the antennas black ; head 

 and thorax coarsely punctured ; elytra deeply punctate-striate, the interstices costate, the base strongly 

 swollen. 



Length 2-2 J lines. 



Head irregularly and coarsely punctured at the vertex ; the frontal tubercles broadly trigonate, bounded 

 behind by a deep groove ; the penultimate joint of the palpi slightly thickened ; antennae distinctly 

 incrassate at the terminal joints, the five basal joints fulvous, the five following ones black, the terminal 

 joint reddish fulvous ; thorax twice as broad as long, subquadrate, the anterior angles obliquely thickened, 

 the surface coarsely and deeply, as well as irregularly but not very closely, punctured ; scutellum broad ; 

 elytra with the basal portion strongly raised, the surface longitudinally costate throughout, the interstices 

 deeply punctured. 



Hah. Guatemala, Purula {Champion). 



In the costate and deeply punctured elytra, A. puncticolle agrees with A. godmani 

 and A. guatemalense ; I must, however, separate it on account of the very coarse 

 punctuation of the head and thorax, which punctuation is not to be found in any other 

 species of the genus known to me. 



22. Allochroma frontale. 



Piceous, glabrous ; lower part of the face, the thorax, legs, and antennas, testaceous ; elytra very strongly 

 punctate-striate, the dise dark brown, a narrow lateral longitudinal band (nearly extending to the apices) 

 pale testaceous. 



Var. Above obscure testaceous, the extreme apices of the elytra piceous. 



Length l|-2 lines. 



Head with a few fine punctures at the vertex, the latter convex, piceous ; the lower part of the face testaceous ; 

 labrum piceous ; antennas half the length of the body, robust, piceous or entirely testaceous, the sixth and 

 seventh joints thickened, of equal length, and longer than the preceding ones ; thorax transversely 

 subquadrate, twiee as broad as long, the sides slightly narrowed at the base, the anterior angles somewhat 

 thickened, and each furnished with a single very long hair, the surface not visibly punctured, slightly 

 depressed at the base ; scutellum broader than long ; elytra rather flattened, very strongly and closely 

 punctate-striate, the interstices strongly costate near the sides, the entire disc dark or paler brown or 

 fuscous, this colour bounded near the lateral margin by a narrow pale testaceous band which curves round 

 near the apices to the suture, leaving the extreme apex of each elytron of the ground-colour ; underside 

 piceous, the last abdominal segments sometimes pale ; posterior tibiae armed with a double spur ; the 

 claws appendiculate. 



Hah. Panama, Bugaba, Volcan de Chiriqui (Champion). 



In intensity of colour many degrees of variation are to be found in this species : the 

 paler portions, including the elytral bands, being sometimes nearly white, and the head 

 in some specimens entirely testaceous. The antennae also vary in colour ; in the female 

 they are simple, without thickened sixth and seventh joints. 



23. Allochroma nigroplagiatum. (Tab. XXV. fig. 18.) 



Ovate, glabrous, obscure testaceous ; the breast and the apical joints of the antennas black ; thorax with three 



black spots ; elytra closely punctate-striate, testaceous, each with six black spots (2.2.1.1). 

 Length 2 lines. 

 Head impunctate, the extreme base and an obscure central spot at the vertex, black ; the frontal elevations 



