564 PHTTOPHAGA. 



147. Diabrotica opacicollis. 



Black, the lower part of the head, thorax, and femora flavous; thorax finely punctured, with two impressions ; 

 elytra metallic green, very closely and distinctly punctured. 



Var. Thorax blackish ; elytra dark violet-blue. 



Length 2-2£ lines. 



Head ameous or greenish-black at the vertex, the lower part flavous ; labrum black ; antennae black, the third 

 joint twice as long as the second ; thorax one half broader than long, the surface opaque, finely punctured, 

 and impressed with two broad fovese ; scutellum piceous ; elytra metallic green, very distinctly and closely 

 punctured ; underside of the thorax, the breast, and the femora, flavous ; abdomen, tibiae, and tarsi, black. 



Hab. Mexico, Toxpam, Cordova (Salle). 



The punctured and opaque thorax and the very closely and rather strongly punctured 

 elytra separate this species from D. IcetaUlis ; the variety does not differ in any way, 

 except in colour. 



148. Diabrotica lineato-punctata. 



Head, the intermediate joints of the antennae, and the breast, black ; thorax transverse, flavous, bifoveolate ; 

 elytra metallic blue, strongly semipunctate-striate ; legs flavous. 



Var. Antennae with the basal joints black ; underside entirely flavous. 



Length 2| lines. 



Head impunctate, with a deep longitudinal fovea between the eyes ; palpi flavous ; antennae black, the three 

 basal and the three apical joints flavous, the third joint twice as long as the second ; thorax more than 

 twice as broad as long, flavous, impunctate, deeply bifoveolate ; scutellum black ; elytra rather broadly 

 ovate, slightly dilated posteriorly, the base somewhat swollen, the punctuation strong and arranged in 

 rather regular closely approached rows, but becoming finer and more irregular towards the apex ; legs and 

 abdomen flavous, the breast black. 



Hab. Mexico, Tuxtla (Salle) ; Guatemala, Zapote (Champion). Three specimens. 



Of rather convex and posteriorly dilated shape, and principally distinguished by the 

 punctuation of the elytra being arranged in nearly regular rows. The variety was col- 

 lected at Tuxtla. 



149. Diabrotica distinguenda. (Tab. XXXII. fig. 5.) 



Ovate, subdepressed, flavous, the antennae piceous, the head rufous ; thorax rufous, margined with flavous, 

 deeply bifoveolate ; elytra dark greenish, rugosely punctured, the lateral and apical margins flavous. 



Length 3 lines. 



Head not longer than broad, with the usual fovea on the vertex, impunctate, rufous ; antennae piceous, the 

 basal joint fulvous, the third joint more than twice the length of the second ; thorax transverse, more 

 than twice as broad as long, the anterior angles slightly produced and thickened, the posterior angles 

 somewhat distinctly pointed outwards, the disc impunctate, rufous, foveolate on each side, the anterior and 

 posterior margins narrowly flavous ; scutellum black ; elytra rather flattened, closely rugose-punctate, 

 greenish-black, margined at the sides and apices with flavous ; tibiae and tarsi and the upper edge of the 

 femora black, the femora beneath and the underside flavous. 



Hab. Mexico (Salle). A single specimen. 



The colour of the thorax in connection with the rugosely-punctured elytra separates 

 D. distinguenda from the preceding species. 



