304 Mr. T. V. Wollaston on the Coleoptera of St. Helena. 



posterior tibiae (particularly, however, the intermediate pair) 

 conspicuously curved, whilst in the opposite sex the hinder 

 ones are nearly (if not quite) straight, and even the middle 

 pair but verT/ slightly bent inwards. Whether the C. Helence 

 of Hope was established on an unusually small and dark in- 

 dividual of this species I cannot feel quite positive ; but as 

 the published description of it does not by any means tally 

 with the C. Jialigena^ I am compelled (in the absence of evi- 

 dence which is positive) to retain the two as distinct. If, how- 

 ever, they should prove ultimately to be conspecitic, I need 

 scarcely add that the name of Helence (as the prior one) will 

 of course have to be adopted. 



3. Calosoma Helence. 



C. " atrum ; elytrorum margine seneo ; antennis basi piceis, pedi- 

 busque nigris. Long. hn. 8 ; lat. lin. 3|. 



" Habitat in ins. Sanctse Helense. In Mus. Dom. Darwin. 



" Atrum ; elytris striatis margine seneo, punctisque excavatis triplici 

 serie dispositis. Antennae 4 primis articulis piceis, rehquis fusco- 

 pubescentibus. Corpus supra et infra nigrum. Thorax transverse 

 ovatus, marginatus. Elytra striata, subrugosa ; marginibus ex- 

 ternis subvirescentibus, punctisque excavatis triplici serie ordi- 

 natis. Pedes nigri, tibiis intermediis incurvis." [Ex iTope.] 



Calosoma Helence, Hope, Trans. Ent. Soc. Lond. ii. 130 (1838). 



Although perhaps it is scarcely likely that so small an 

 island as St. Helena should possess two species of Calosoma^ 

 nevertheless, since the above description (which I have trans- 

 cribed verbatim from Mr. Hope's paper) does not by any 

 means agree with that of the C. haligeria, I can scarcely take 

 uj)on myself to regard the C. Helence as identical with the 

 latter, and I have therefore (until at any rate further evidence 

 shall settle the question) cited it as distinct. Judging from 

 the published diagnosis, the C. Helence would appear to be 

 smaller than the haligena ; and it is stated to be deep black, 

 though there is of course a possibility that the more brassy 

 form did not happen to be included amongst the individuals 

 which were examined by Mr. Hope. In the C. Helence the 

 elytra, too, are defined as merely " striata, subrugosa ; " 

 whereas those of the haligena are deeply crenate-striate and 

 have their interstices transversely imbricated in a most coarse 

 and conspicuous manner ; and the intermediate tibiae only of 

 Mr. Hope's species are said to be curved, whereas in the C. 

 haligena the four hinder ones of the male sex are powerfully 

 arcuate. Still, it is of com'se possible that the C. Helence may 

 have been defined from an unusually small and dark example 

 of what I subsequently enunciated uuder the trivial name of 



