310 



CICIXUELID.E. 



Dr. Horn remarks that this little species is one of the most 

 interesting of those belonging to the genus Prothyma, as it is the 

 most aberrant species of the germs, and presents points of 

 important phylogenetic significance. 



Genus HEPT0D0NTA. 



Heptodonta, Hope, Col. Man. ii, 1838, p. 22 ; Lacordaire, Gen. Col. i, 

 p. 21. 



Type, Cieindela analis, Fabr. 



This genus is characterised by the long parallel-sided elytra and 

 their conspicuously oblique apices, and also by the fact that the 

 underside is practically glabrous, except lor a distinct fringe of 

 white pubescence on the anterior edge of the posterior coxal 

 cavities ; the labrum, as a rule, has seven distinct teeth ; the 

 wings are never reduced ; in the male the intermediate, as well 

 as the anterior, tarsi are dilated. 



The genus contains about fifteen or eighteen species, which 

 appear to be chiefly confined to India, the Malay Peninsula, and 

 Indo-China ; one species occurs in the Philippines and one has 

 been recorded doubtfully from Hong-Kong. Five species occur 

 within our area. 



Key to the Species. 



I. Pronotum transversely globose ; sculp- 



ture of elytra rugose to apex, the 

 wrinkles being very strong and con- 

 fused, running in different directions . 



II. Pronotum not transverse, usually dis- 



tinctly longer than broad. 



i. Sculpture of elytra much finer towards 



apex, rugose, but with the wrinkles 

 less close together, shorter than in 

 H. nodicollis, and never oblique .... 



ii. Elytra punctured, with the punctures 



somewhat confluent in parts towards 

 base. 



1. Length 15-17 mm. ; upper surface 



duller, with finer sculpture .... 



2. Length 10-12 mm. ; upper surface 



nodicollis, Bates, p. 311. 



hraatzi, W. Horn, p. 312. 



pulchella, Hope, p. 312. 



more shiny, with coarser sculpture 

 especially towards base. 



A. Pronotum with the sides rather 



strongly rounded, subglo - 



bose eugenia, Chaud., p. 313. 



B. Pronotum with the sides scarcely 



rounded, almost straight, 



rowi, W. Horn, p. 313. 



