148 Mr. T. Vernon Wollaston on the Euphorhla-infestivg 



culis : tib'i'is gracilibus, breviter bicalcaratis : tarsis (nisi 

 fallor) ut in Lcemophlceo, 5-articulatis sed in maribns hetero- 

 meris ; articulo Imo in utroque sexu minutissinno, segerrime 

 observando, intra tibiarum apicem (in posterioribus saltem) 

 recondito. 



Obs. Genus inter Europs (Colydiadum) et Lcemophlceus 

 (Cucujidum) aliquo modo situm, — ad ilium habitu general!, 

 prothorace elongato subparallelo in disco longitudinaliter 

 notato elytrisque truncato-abbreviatis, sed stria sublaterali 

 protlioracica, maxillis et fere labro necnon articulo antennali 

 octavo magnitudine deminuto cum hoc melius congruens. 

 A generibus illis ambobus tamen antennarum labrique sub- 

 quadrati structura, praeter caetera valde conspicua, omnino 

 discedit. 

 A KavXot;, caulis, et ye'/xw, incolo. 



The curious little insect, the details of which are described 

 above, would appear, in many respects, to be intermediate between 

 Europs (of the Colydiadce), with which it lives in society, and 

 Lcemophloeus (of the Cuciijidce) ; though its most essential features 

 would certainly indicate a closer affinity with the latter than with 

 the former. In its general facies it is perhaps more suggestive of 

 Europs than of Lcemophlceus, — its elongate and almost parallel 

 prothorax (which has a slight central depression down the disk, 

 answering to the much deeper one of the E. impressicoUis and the 

 double series of punctures in the E. duplicatus), in conjunction 

 with its apically abbreviated elytra, being points in which it nearly 

 coincides with that genus. Nevertheless in the whole of its instru- 

 menta cibaria, and the structure of its antennas, as well as in its 

 less truncated elytra, it recedes entirely from Europs, and makes 

 a much nearer approach to the various groups of the Cuciijidce. 



With L(smophlceus and Phlceostichus, indeed, Caulonoinus has an 

 immense deal in common — agreeing with the former in its minute, 

 unciform, inner maxillary-lobe, and (to a considerable extent) in 

 the shape of its labial organs and palpi ; whilst its clavated 

 antennae (with their enlarged basal joint and diminished eighth 

 one) almost tally with those of the latter. But I would regard its 

 sublateral prothoracic costa, and the reduced ante-claval articula- 

 tion of its antennae, as more significant than anything else in affili- 

 ating it with the Cucujidcs — this peculiarity in the dimensions of 

 the eighth joint being strongly expressed in Pediacus and Plilceos- 

 tichus, and also in most of the Lcemopliloei and Silvani, whilst the 

 prothoracic line is more or less indicative of the Cucuj'idce gene- 

 rally. In most of the Cucujklce this hair-like submarginal costa 



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