382 Kev. W. W. Fowler on new 



which genus these particular species bear a closer 

 external resemblance than they do to the majority of the 

 ordinary species of Lanf/iLria. 



Another very important point is the relation of the cly- 

 peus to the labrum. These parts seem to a certain extent 

 to be correlative ; if the clypeus is small the labrum is pro- 

 portionately large; if, however, the clypeus is large the 

 labrum is proportionately small, and in some cases the 

 corneous portion forms a mere strip, or the labrum is 

 entirely membranous and partially concealed behind the 

 clypeus. A few instances may perhaps be mentioned. 

 In Callilangiiria the clypeus is very short (this is 

 especially noticeable in C. eximia, n. s.) ; the labrum, 

 however, is actually longer than the clypeus, and is very 

 distinct ; in Pachijlangiiria the clypeus is long and the 

 labrum short ; in Teretilaugiiria the clypeus is very 

 large and distinct, rather convex, with the suture plain 

 and well-marked, and the apparent labrum is reduced 

 to a narrow strip ; in Douhledaya, again, the clypeus is 

 very narrow and emarginate, while the labrum is rather 

 large and membranous ; in Goniolanguria the clypeus is 

 very peculiar, being large, with a strong .y -shaped 

 emargination ; in Langurites it is large and distinct, 

 and the labrum is also well-marked. The clypeal suture 

 usually runs straight across between the base of the 

 antennae, but it is rather variable as to position and 

 distinctness, and is often distinctly curved ; when it is 

 strong the head is usually depressed just before it: how- 

 ever, whatever may be the size of the clypeus, the socket 

 for the reception of the antennae appears to be continued 

 to meet it. The nearer, then, that the clypeal suture 

 approaches to the mouth the larger the sockets become ; 

 this is very apparent in several of the genera mentioned, 

 and more especially in genera akin to Cladoxena ; in 

 the latter genus the head is large and the clypeus is 

 very small and situated at the extremity ; the antennal 

 socket accordingly runs along the whole side of the 

 front part of the head as far as the mouth ; a clj'peal 

 suture in some specimens appears to be indicated 

 between the antennae, and may prove deceptive, but 

 there is no real division, and the length of the antennal 

 socket indicates its true position. 



In the division of the Languriidce great stress has 

 been laid upon the number of joints in the club of the 

 antennae, and yet the genus Languria, as at present 



