534 PHYTOPHAGA. 



Panama. Mr. Baly 1 says nothing about the elytra having the apices produced into a 

 small tooth as in D. corusca, this character being constant in more than fifty specimens 

 before me. In a few, however, obtained with the normal form at Cerro Zunil the 

 elytra are rounded at the apices and of a more shining metallic colour ; but, in the 

 absence of other marks of distinction, I have thought it best not to separate these 

 examples from the present insect. Another closely-allied form, D. consimilis, has been 

 described by Mr. Baly; this differs in the narrower third elytral costa. 



I should refer many specimens from Guatemala to this last-named insect had I 

 not numerous examples before me which, on account of the intermediate width 

 of the costa in question, prove that not too much dependence can be placed on this 

 character by itself. 



71. Diabrotica consimilis. 



Diabrotica consimilis, Baly, Trans. Ent. Soc. Lond. 1886, p. 449 \ 

 Eab. Guatemala, Quezaltenango, Volcan de Agua (Champion). — Ecuador x ; Peru \ 



I must refer the ten specimens obtained by Mr. Champion in Guatemala to this 

 species, with the description of which they entirely agree. In B. consimilis the elytra 

 are entirely black, with the exception of the margins and the flavous vitta, this latter 

 being confined to a single costa which is not broader than the others ; the antennae 

 have the three basal joints flavous below (the description gives the colour as piceous) ; 

 and the legs are black, the femora broadly flavous at the base. 



72. Diabrotica longicollis. 



Black ; thorax flavous, with two impressions, scarcely broader than long ; elytra piceous, with a subsutural 

 broad vitta and the lateral margin flavous, the interstices strongly punctured and longitudinally costate, 

 sparingly covered with white pubescence. 



Length 1^-2 lines. 



Head black, impunctate; antennae somewhat thickened towards the apex, the lower three and sometimes 

 the apical two joints fulvous, the rest black, the third joint rather more than twice the length of the 

 second; thorax subquadrate, narrowed towards the base, the surface impunctate, with two distinct 

 fovese near the base ; elytra strongly and closely punctured, the punctures forming single rows and 

 interrupted at the dark portion by narrow longitudinal costae, the flavous subsutural costa much broader 

 and smooth, and connected at the apex with the similarly coloured lateral margin. 



Eab. Guatemala, Volcan de Atitlan, Zapote (Champion). 



The comparatively long thorax, in connection with the sculpture and pubescence 

 (sometimes abraded) of the elytra, will help to separate B. longicollis from its several 

 allies ; the deep elytral punctuation arranged in single rows is another character of 

 distinction. 



73 Diabrotica theimei. 



Diabrotica theimei, Baly, Journ. Linn. Soc, Zool. xix. p. 231 \ 



Eab. Mexico \ Presidio (Forrer), Cordova, Vera Cruz (Salle), Jalapa, Matamoros 



