CJwleva.] CLAVICOENIA. 55 



scuta arc complete and arc covered with minute seta} j the larva bears a considerable 

 resemblance to that of Liodes. 



I. Mesosternum simple without carina; elytra without 



cross striation. 



i. Intermediate tarsi of male simple ; tarsi slender j 

 antennae long and slender. 



1. Species larger (4-5 mm.) and more elongate; 



posterior femora twice as long as coxae .... Sub. -Gen. CHOLEVA, i. sp. 



2. Species smaller (H-3 mm.), more or less ovate; 

 posterior femora one and a half times as long as 



coxae Sub.-Gen. NAEGUS, Thorns. 



ii. Intermediate tarsi of male with the first joint 

 dilated ; tarsi rather stout ; antennae, as a rule, 



sensibly or strongly thickened towards apex . . . Sub.-Gen. PTOMAPHA&CS, 



Sellvo. 



II. Mesosternum carinatej elytra with fine cross 



striation Sub.-Gen.NEMADU8,!TAozs. 



(Sub.-Gen. Choleva, i. sp.) 



The species belonging to this sub-genus are easily distinguished by their 

 elongate form, long legs and slender antennae, and large size, as well as 

 by the more distinct sculpture of the elytra ; with regard to the first 

 three or four species there has been considerable difference of opinion 

 among various authors, and the question cannot be considered as yet 

 having been settled finally ; the shape of the thorax in G. aiigustata and 

 its near allies varies considerably in different specimens, but this part 

 appears never to be widest behind as in C. agilis t whereas C. spadicea is 

 very distinct by reason of its sculpture and the wide margins of the 

 thorax ; I have followed Eeitter in considering C. angustata, C. inter- 

 media, and C. cisteJoides as separate species, and in regarding C. Sturmii 

 as the male or a variety of C. angustata, but I do not feel at all sure 

 whether it would not be more correct to regard all four species as merely 

 forms of one variable species, as the distinctions are after all very slight, 

 and seem to be more or less variable ; for further particulars as to the 

 group, and in fact as to the whole genus generally, the student is referred 

 to Andrew Murray's Monograph of the Genus Catops (Annals and 

 Magazine of Natural History, July, 1856). 



I. Thorax narrower than elytra, broadest at or about 



middle. 



i. Thorax feebly punctured with margins not strongly 

 explanate. 



1. Pubescence of elytra even without raised hairs at 

 sides and apex ; posterior trochanters of male 



moderately produced. 



A. Sutural angle of elytra in female produced 

 into a small sharp tooth ; pubescence yellow ; 



posterior femora of male not dikted ... . C. ANGTTSTATA, F. 



B. Sutural angle of elytra in female simple ; 

 pubescence of elytra greyish-brown ; posterior 



femora of male dilated C. CISTELOIDES, Frohl. 



2. Pubescence of elytra uneven at sides and apex, 

 with rows of raised hairs ; posterior trochanters 



of male long-, gouge-shaped C. INTEHMEDIA, Kraalz. 



