PIABROTICA. 563 



in the want of the black thoracic bands, and in the elytra being dark blue (not bright 

 metallic green) in colour ; from the latter it is separated by the colour, by the flat (not 

 raised) basal portion of the elytra, and by the interspaces of the latter not being 

 transversely wrinkled. The base of the head in all the specimens is piceous, not 

 metallic green. The localities for D. semiccerulea are all upon the Pacific, those for 

 D. mystica upon the Atlantic, slope ; 1). IcetaUlis is more widely distributed. 



145. Diabrotica satellitia. 



Black ; thorax testaceous, transversely impressed ; elytra dark blue, finely punctured on the disc, more strongly 

 so at the sides, the latter with a single straight costa from the shoulder to the middle, the basal portion 

 flat. 



Var. Thorax entirely black ; femora testaceous at the base. 



Length l|-2 lines. 



Hab. Panama, Volcan de Chiriqui [Champion). 



This species resembles D. semiccerulea in coloration ; but the head and antennae are 

 entirely black, the elytra have but a single straight (not curved) costa on each side, and 

 the legs are black. These differences will be sufficient to distinguish B. satellitia from 

 the three preceding species, from all of which it differs in its larger size and in the 

 entirely black head and antennae. Most of the specimens belong to the variety with 

 an entirely black thorax, only two having the latter of a testaceous colour ; as in the 

 allied species, the surface of the thorax has two deep transverse depressions and is 

 impunctate. The straight lateral costa of the elytra further separates the present 

 insect from its congeners. 



146. Diabrotica nitidula. 



Ovate, widened posteriorly, black; thorax impunctate, with transverse depressions; elytra metallic blue, the 

 base slightly convex, the disc finely semipunctate-striate. 



Var. The head and thorax fulvous. 



Length 1| line. 



Head longer than broad, impunctate, the vertex minutely granulate ; antenna? more than half the length of the 

 body, rather robust, the third joint twice as long as the second ; thorax twice as broad as long, the sides 

 nearly straight, the surface extremely finely granulate, without punctures, transversely and rather strongly 

 depressed on each side ; scutellum black ; elytra distinctly widened posteriorly, the base swollen and 

 bounded by a distinct depression below, the punctuation Ene and not very closely bat rather regularly 

 arranged in lines ; the underside and legs black ; the first joint of the posterior tarsi as long as the following 

 three joints together. 



Hab. Guatemala, Purula, Senahu (Champion)-, Panama, Volcan de Chiriqui (Cham- 

 pion). 



Amongst the small species with metallic blue elytra I), nitidula may be known by the 

 ovate and dilated general shape, and the raised basal portion of the elytra and their 

 semipunctate-striate punctuation ; the thorax is strongly transverse and distinctly trans- 

 versely depressed. The variety was collected with the type at Purula; it does not 

 differ in any way, except in the colour of the head and thorax. ^ 



4c2 



