1879.] PHYTOPHAGOUS COLEOPTERA. 791 



ceding species, black. Thorax transverse, widened in the middle, 

 the base contracted ; surface minutely punctured, yellowish white, 

 with an indistinct longitudinal fuscous line in the middle, sometimes 

 entirely absent. Elytra rather convex, almost subcylindrical, scarcely 

 more distinctly punctured than the thorax ; two small spots, one of 

 which is placed before, the other behind the middle, near the sutural, 

 and a third spot between the two, uear the lateral margin of each 

 elytron, black. Underside fuscous or dark ferruginous, more or 

 less stained with black. Legs flavous, base of the femora as well as 

 the apex of the tibiae and tarsi more or less black. In the specimens 

 which I take to be male, there is the same deep fovea near the 

 lateral margin ; but the latter itself is not interrupted as in the pre- 

 ceding species, and the internal tooth is not isolated, but connected 

 with the sides of the fovea in the shape of a convex ridge. Claws 

 appendiculate. 



35. DlABROTICA IMITANS, Sp. nOV. 



Oblong-ovate, dilated posteriorly. Black, base of head and the 

 thorax fulvous ; antennae (their apex excepted), legs, and elytra bright 

 flavous, the latter with four basal spots and two broad transverse bands 

 black. 



Var. The basal spots on the elytra united in the form of a third 

 transverse band. 



Length 3 lines. 



Hub. Venezuela. 



Lower part of face deeply excavated ( S ), shining black, vertex 

 and sides of face fulvous, the former with a few small punctures ; 

 basal joint of the antennae very long and slender, as long as the 

 fourth, second joint less than half the size of the third, first five or 

 six joints flavous, the rest piceous. Thorax subquadrate, the hinder 

 angles oblique, sides armed with a small tubercle at each side below 

 the anterior angles ; surface obsoletely transversely depressed, 

 minutely punctured. Scutellum black. Elytra wider than the thorax, 

 much dilated behind the middle, convex, deeply punctured, the inter- 

 stices obsoletely rugose ; flavous, two elongate spots at the base of 

 each elytron (in the variety united into a band), a transverse regular 

 band at the middle not touching the lateral margin, and another 

 wider one near the apex black. 



In the female the deep excavation of the head is wanting, and the 

 fulvous colour extends much lower down, This species is at once 

 distinguished from D. ventricosa, Jacoby (to which it is nearly allied 

 in colouring), by the flavous margination of the elytra. 



36. DlABROTICA FENESTRALIS, Sp. nOV. 



Elongate, subparallel. Flavous ; head, legs, and breast black ; 

 elytra flavous or testaceous, with the lateral and sutural margins and 

 three transverse narrow bands, the first of which is connected with 

 the second by a short lateral stripe, piceous. 



Length 3 lines. 



Uab. Chontales, Nicaragua, and Costa Rica. 



roc. Zool. Soc. — 1879, No. LI. 51 



