524 PHTTOPHAGA. 



50. Diabrotica curvilineata. (Tab. XXX. fig. 15.) 



Testaceous, the labrum, breast, and tibiae black ; thorax with a deep depression ; elytra testaceous, with the 

 suture anteriorly, a narrow submarginal stripe (abbreviated near the apex), and two small spots (one near, 

 the other below the middle), black. 



Var. The elytral spots connected and forming a discoidal narrow line. 



Length 2^-3 lines. 



Hdb. Mexico, Playa Vicente, Cordova, Tuxtla (Salle) ; British Honduras, E. Sarstoon 

 (Blancaneaux) ; Guatemala, Pantaleon, Zapote, Mirandilla, San Geronimo, Chacoj, 

 Teleman (Champion) ; Panama, Volcan de Chiriqui (Champion). 



Closely allied, and almost similar in the elytral pattern, to D. nigro-lineata ; but 

 differing in the head being fulvous, and the elytra having narrower black lines (of which 

 the lateral one is more or less interrupted near the apex), and two small spots placed 

 one below the other on the disc of each. In the variety in which these spots are 

 represented or connected by a black line, as in the preceding species, this line is shorter 

 and does not extend so far upwards. In D. curvilineata the basal margin of the elytra 

 constantly remains of the ground-colour; in the allied species it is black. The 

 antennae have the intermediate joints, and the apex of the terminal one, more or less 

 infuscate. Having no intermediate forms between this insect and D. nigro-lineata 

 before me, I am obliged to treat them as distinct species. 



51. Diabrotica unistriata. 



Testaceous, the head, breast, tibiae, and tarsi black ; thorax fulvous, the disc foveolate ; elytra very minutely 

 punctured, testaceous, with a narrow longitudinal stripe near the lateral margin, black. 



Length 3 lines. 



Head black; antennae stout, the three basal joints testaceous, the five following ones piceous, the others 

 flavous, the third joint one half longer than the second ; thorax slightly broader than long, the sides 

 nearly straight, the surface impunctate, with three obsolete foveae on the disc ; elytra scarcely visibly 

 punctured, testaceous, each with a narrow longitudinal black stripe placed close to the lateral margin 

 but not extending to the apex ; abdomen and femora flavous, the tibiae and tarsi black. 



Hdb. Costa Rica (coll. Jacoly). 

 A single specimen. 



52. Diabrotica unilineata. (Tab. XXX. fig. u.) 



Testaceous, the antennae, the upper margin of the femora, the tibiee, and tarsi black; head and thorax fulvous, 

 the latter bifoveolate and with four black spots; elytra with the suture narrowly, and a submarginal 

 stripe, black. 



Var. Thorax without spots. 



Length 2-2| lines. 



Head with a few fine punctures on the vertex, the latter with a deep fovea ; labrum fulvous ; antenna? black 

 the last two joints stained with fulvous at their base, the third joint nearly twice the length of the 

 second; thorax quite one half broader than long, the surface rather convex, finely and rather closely 

 punctured, with two small but deep foveas and four small black spots placed transversely across the disc 

 before the middle ; scutellum black ; elytra very closely, distinctly, and somewhat rugosely punctured 

 the suture narrowly throughout its entire length, and a slightly curved and inwardly directed stripe 

 commencing at the shoulders and extending nearly to the apex, black ; beneath testaceous ■ the femora 

 marked with a black line on their upper edge, the tibiee and tarsi entirely black. 



