518 PHYTOPHAGA. 



Head impunctate, with the usual fovea ; antennae scarcely more than half the length of the hody, fulvous, the 

 basal joint generally black, the third joint about one half longer than the second, the latter very short ; 

 thorax subquadrate, the sides nearly straight, the surface impunctate, black, shining ; scutellum black ; 

 elytra more or less transversely depressed below the base, very minutely punctured, the first third of their 

 length occupied by a transverse black band, the space below the latter to a little distance from the apex 

 dark fulvous, the apices themselves bright flavous ; legs and the underside black ; abdomen flavous. 



Hal. Guatemala, Paso Antonio 250 feet (Champion). 



This is a curiously-coloured insect not difficult to recognize. In some examples the 

 dark basal portion of the elytra assumes a more piceous tint ; others have a distinct 

 more or less broad band placed below the base ; the basilar portion is somewhat raised 

 in all the specimens. 



g. Elytra flavous, with small Hack spots. 



37. Diabrotica duodecim-notata. (Tab. XXX. fig. 5.) 



Diabrotica duodecim-notata, Harold, Coleopt. Hefte, xiii. p. 91 (1875) \ 

 Diabrotica disjuncta, Chevr. Dej. Cat. 3rd ed. p. 405 2 . 

 Galeruca sexmaculata, Sturm, in litt. 

 Diabrotica 12-signata, Sturm, in litt. 



Hal. Mexico x 2 , San Pedro, Saltillo, Parras in Coahuila, San Luis Potosi (Br. Palmer), 

 Paso del Norte, Chihuahua city, Saltillo, Villa Lerdo in Durango, Durango city, Tula, 

 Irapuato, San Isidro, Jalapa (Edge) ; Orizaba, Cordova, Oaxaca, Guanajuato, Puebla, 

 Coscomatepec (Salle). 



Of the six small black spots or short streaks on each elytron, the one placed near the 



scutellum is, in all the specimens I have examined, obliquely directed outward thus 



forming, with the corresponding spot on the opposite side, a A -shaped mark. The 

 antennae have the first two or three joints rather pale, the rest black ; the legs (the 

 bases of the femora excepted) and the underside are more or less black, the abdominal 

 segments, however, being usually margined with testaceous. 



I have only seen this species from Mexico, and chiefly from the more northern parts 

 of that country, some of our specimens being from the United States frontier. Several 

 other closely-allied forms are known from different parts of South America. We figure 

 a specimen from Orizaba. 



38. Diabrotica spilota. (Tab. xxx. fig. 6.) 



Diabrotica spilota, Baly, Journ. Linn. Soc, Zool. xix. p. 216 (1886) \ 



Hob. Mexico 1 ; Panama (Boucard), Bugaba, Volcan de Chiriqui, Pena Blanca (Cham- 

 pion). — Colombia x . 



A specimen kindly given to me by Mr. Baly differs from all others obtained by Mr. 

 Champion in the piceous-coloured disc of the thorax, and in having a narrow transverse 



