504 PHTTOPHAGA. 



Head impunctate ; antennas piceous, the three apical joints yellowish-white, the apex of the terminal one 

 piceous ; thorax impunctate, with two distinct foveas ; scutellum flavous ; elytra somewhat rugosely punc- 

 tured, the flavous bands transverse and not quite extending to either margin ; pygidium black. 



Eab. Panama, Volcan de Chiriqui (Champion). 



Separated from B. morosa and other species of this section by the long antennae, 

 which extend beyond the apices of the elytra in the male, the entirely flavous under- 

 side, the black pygidium, and the transversely shaped elytral spots or bands. 



5. Diabrotica fenestralis. (Tab. XXVIII. fig. 20.) 



Diabrotica fenestralis, Jacoby, P. Z. S. 1879, p. 791 \ 

 Eab. Nicaeagua, Chontales 1 (Belt) ; Costa Rica *, Volcan de Irazu (Bogers). 



A comparison of this insect with B. morosa seems to leave but little doubt that it 

 must be looked upon as a variety of the latter in which the elytral black bands sur- 

 rounding the flavous spots are reduced in width or interrupted, the shape and position 

 of the bands being exactly similar. As I have three specimens, however, before me 

 agreeing with each other, and the localities of B. fenestralis are also different (though 

 from an intermediate region and apparently connecting) from those in which B. morosa 

 was obtained, it is perhaps better to retain the two insects as distinct for the present. 



6. Diabrotica elegantula. (Tab. XXVIII. fig. 21.) 



Diabrotica elegantula, Baly, Journ. Linn. Soc, Zool. xix. p. 213 (1885) \ 



Eab. Panama, Bugaba, Volcan de Chiriqui, David, Tole, San Lorenzo, San Feliz 

 (Champion). — Colombia, E. Magdalena, Muzo, San Carlos \ 



This seems to be rather a variable species. Amongst the large number of specimens 

 before me, there are only a few which agree very nearly with Mr. Baly's type ; the 

 others have the narrow transverse median band of the elytra replaced by a broad round 

 flavous spot, though the other characters are as in the typical form ; one of these latter 

 is figured here. I may add that, in all the specimens before me, the third joint 

 of the antennas is nearly twice as long as the second ; Mr. Baly gives the size as 

 " slightly longer." 



7. Diabrotica gratiosa. (Tab. XXVIII. fig. 22.) 



Diabrotica gratiosa, Baly, Journ. Linn. Soc, Zool. xix. p. 215 (1885) \ 



Eab. Mexico, Cordova (Salle l ) ; Panama, Volcan de Chiriqui, Bugaba (Champion). 

 — Colombia 1 i San Carlos 1 . 



At first sight B. gratiosa seems but to represent a variety of B. elegantula ; several 

 constant differences seem, however, to pronounce the insect a distinct one. In B. 

 gratiosa the metallic green portion of the elytra is not connected at the sides as in 

 B. elegantula, where it forms a straight line, and the anterior band which includes the 



