DIPHATJLACA. 269 



the first three joints are red ; the thorax in the present species is more convex and 

 rather longer ; and, lastly, the colour of the entire insect is more of a brassy dark 

 green. 



11. Diphaulaca jucunda. (Tab. XVI. fig. 2.) 



Diphaulaca jucunda, Harold, Coleopt. Hefte, xiv. p. 9 (1875) 1 . 



Hah. Panama, Volcan de Chiriqui (Champion). — Colombia 1 . 



The specimens obtained by Mr. Champion agree very nearly with a typical specimen 

 contained in my collection, kindly given to me by M. Oberthiir. There are some slight 

 differences to be found in the colour of the first three joints of the antennae, which is 

 not red but metallic green above in the Panama specimens, although those joints are 

 fulvous below. The punctuation of the elytra is also somewhat more strongly 

 impressed and a little more regular ; but I think these differences only attributable to 

 local influences. 



12. Diphaulaca colombica. 



Diphaulaca columbica, Harold, Coleopt. Hefte, xiv. p. 8 (1875) \ 

 Hah. Mexico, Cordova, Toxpam (Salle). — Colombia 1 . 



The differences notable between the Mexican insects and one from Colombia in my 

 collection (named by von Harold) are but slight. In the latter the first joints of the 

 antennae are reddish at their apex ; in the Mexican specimen they are black. In other 

 respects the insects agree with the description of the author. 



18. Diphaulaca irazuensis. 



Subelongate, narrow, obscure greenish black below, above metallic green ; antennae, tibiae, and tarsi black ; 



elytra depressed below the base, finely punctured at the same place, impunctate from middle to apex. 

 Length 1J line. 



Hab. Costa Eica, Volcan de Irazu, Rio Sucio (Bogers). 



I separate this species from D. jucunda and allied species on account of the following 

 differences : — The underside is nearly black, the breast and femora only being tinged 

 with metallic greenish colour. The antennae are black, with the exception of the first 

 joint, which is more of a metallic bluish colour ; the third joint is double the length of 

 the second, in which character the antennae agree with D. jucunda. The principal 

 difference is to be found in the punctuation of the elytra, which are very finely punc- 

 tured near the base only, the rest of their extent being nearly impunctate. 



Some specimens from the same locality are of a more robust and broader shape, 

 and the thorax is more transverse ; but as they agree in all other respects, I take 

 this difference to be peculiar to the female sex. The palpi in D. irazuensis have the 

 penultimate joint rather robust. In size and shape the species agrees with D. jucunda. 



