CACOSCEUS. 303 



2. Cacoscelis sallasi. (Tab. xvil. fig. 14.) 



Below, the head and thorax flavous ; antenn®, apex of femora, tibiae and tarsi black ; elytra metallic blue, 

 rugose-punctate. 



Length 3|-4 lines. 



Head nearly as broad as long, transversely grooved between the eyes ; frontal tubercles very small and but 

 little raised ; clypeus much swollen, triangular and narrow ; surface of the labrum, apex of jaws, and the 

 palpi black ; antennas robust, about half the length of the body, the third and fourth joints equal, double 

 the length of the second, the terminal joints thinner ; thorax transversely quadrate, the sides very little 

 rounded ; angles distinct but not produced, surface entirely impunctate, with a shallow transverse groove 

 near the posterior margin, which entirely disappears near the sides ; scutellum flavous, broader than long ; 

 elytra slightly widened below the middle, narrowed at the apex, metallic blue or bluish green, very closely 

 and distinctly punctured, the interstices slightly transversely rugose; their epipleurse very broad, extending 

 nearly to the apex and strongly rugose-punctate; base of the femora flavour the posterior strongly 

 incrassate ; claws appendiculate ; coxal cavities open. 



Eab. Mexico, Jalapa (Edge), Cordova (Edge, Salle). 



I have provisionally placed the present species in Cacoscelis on account of the trans- 

 versely grooved thorax and the rugosely punctured elytra. In other respects, however, 

 there are many differences to be found which would justify the erection of another 

 genus. The thorax is of a more square shape, and the posterior margin is not oblique 

 at the sides, and the elytral epipleurse are extremely broad and rugosely wrinkled or 

 punctured ; the scutellum is, however, as broad as in Cacoscelis : the tibiae show no 

 emargination at their apices. In the specimens which I consider the female sex, the 

 antennas are much less robust and more filiform. 



3. Cacoscelis quinquelineata. (Tab. XVIII. fig. 5.) 



Altica quinquelineata, Latr. Voy. Humb. i. 1811, p. 232, t. 23. fig. 10 '; Hoffinansg. Zool. Mag. i. 

 2, 1818, p. 91. 

 Eab. Mexico, Yuquila, Tehuantepec, Vera Cruz (Salle), Cerro de Plumas {Edge) ; 

 Beitish Hondueas, Belize, river Hondo (Blancaneaux) ; Guatemala, Dueiias, an 

 Geronimo (Champion); Nicaeagua, Chontales (Belt). — South Ameeica. . 



The description given by Latreille agrees perfectly well with the specimens obtained 

 in Central America. The size of the insect varies greatly, but not the coloration. 



4. Cacoscelis flava. (Tab. XVIII. fig. 4.) 



Cacoscelis flava, Clark, Journ. of Entom. ii. 1865, p. 407 \ 

 Eab. Mexico \ Cerro de Plumas (Edge). 



The single specimen obtained by Herr Hoge agrees in all essential points with the 

 short diagnosis given by Clark, to which I may add that the antennae- are about half 

 the length of the body, the fourth joint being longer than the third ; the sides of the 

 thorax are straight, and the posterior angles distinctly oblique ; the elytra can scarcely 

 be called reticulate, but are closely covered with little punctures, the interstices being 



