58 Mr. C. 0, WaterliousG on Coleoptera 



Capitaine Keiremans in Wytsman's ' Genera ' adopts the 

 genus Pithiscus as distinct from Conognalha on account of 

 the difference in the form of the prosternum. I tliink this 

 separation cannot be maintained, I find every j^radation 

 from C. hcemorrhoidalis (the type of tlie genus) to viridi- 

 ventris (the type of Pithiscus). Tlie species are very diverse, 

 but may be arranged in groups, which, however, cannot hn 

 defined even as sections. The following is the order in 

 which the species are arranged in the Museum : — 



C. hceinorr1wid<dis, pretiosissima, iris, mag nijica , varga^i, 

 juno. (All these have the prosternum conically pro- 

 duced in front.) 



C. huqueii, amcena, princeps^ impressipennis, splendens^ 

 hatesii, minor. 



G. leachij ornata. 



G. clara, abdominalis, e.vimia, interrupta. 



G. nijiventris, hi/asciaia, trizonata. 



C. badeni, octogitttata, excellens. 



G. posticalis, opicalis, Jlavipennis, rogen, nigropurpnrea. 

 (These five species have the disk of the thorax 

 im))ressed, and have a fovea above each posterior 

 angle.) 



G. paranensis, 



G. fascipennis, suhdiJatata, insignis^ parallela, sellovii, 

 nigroccerulea, miJiaris, elongata. (Thorax with pos- 

 terior angles impressed.) 



All the foregoing have the thorax delicately punctured. 



G. propinqua, llugi. (Thorax moderately strongly punc- 

 tured, forming a transition to the coarsely punctured 

 species which follow.) 



G. auricoUis, C. & G.* 



G. nero, principalis. 



G. chilensis, gonnellei, compta, consobrina, cyanicolUs, 

 errata. 



G. macleayi, vulnerata. 



G. olivacea, brevlcollis, rujipes. 



G. hamatifera, parallelogramma. 



G. lebasi, souverbii, edwardsi. 



G. costipennis. 



G. viridiventris (type oi Pithiscus), hastaria, sagittaria. 



I think G. bruchi, Kerrem., is undoubtedly the same 



* By some unaccountable error the male of C, edicardsi is frequently 

 found in collections under this name. The true auricoUis is a broad 

 species with unicolorous elytra. 



