CholeVd.] CLAVICORNIA. 55 



scuta are complete and are covered with minute setaj ; the hirva bears a cousiJcrablc 

 reseuililance to that of Liodes. 



I. Mesosternum simple without carina; elytra without 



cross striation. 

 i. Intermediate tarsi of male simple ; tarsi slender ; 

 antenna) long and slender. 



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



posterior femora twice as long as coxai .... Sub. -Gen. Ciioleva, i. sp. 



2. Species smaller (l2-3 mm.1, more or less ovate; 

 posterior femora one and a half times as long as 



coxa3 Sub.-Gen. Naeghs, Tlioms, 



ii. Intermediate tarsi of male with the first joint 

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



sensibly or strongly thickened towards apex . . , Sub. -Gen. Ptomaphaous, 



Helltv. 



II. Mesosternum carinate; elytra with fine cross 



striation Sub.-Gen.NEMADUSjTAoms. 



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

 The species iDelonging 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 th(i elytra ; with regard to the first 

 three or four species there has been considerable difference of oi^inion 

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

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

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

 appears never to be widest behind as in C. a</ili\ Avhereas C. spadicea is 

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

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

 media, and C. cisteloides as separate species, and in regarding C. Shirmii 

 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 dilated ... . C. anGUSTATA, F. 



B. Sutural angle of elytra in female simide ; 

 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 trochautera 



of male long, gougc-shapcd C. intekmedia, Kriiulz. 



