COLEOPTERA. — EUCNEMID.'E. 



233 



under side of the thorax. I have already in (p. 225.) given an account 

 of the habits of the chief genera as well as their names. They are for 

 the most part exotic. 



In the subfamily Eucneaiides the body is oblong and cylindric 

 (^fig- 24. 1. Microrhagus capucinus, fig. 2. mandible, fig. 3. maxilla, 



Fig. 24. 



{fijT. 4. tarsus), the eyes circular and the basal joint of the antennae 

 krge and subcylindric. There are only two British genera, Melasis 

 and Microrhagus. Much confusion has occurred relative to the 

 specific name of the type of the former genus, the same name having 

 been applied to two apparently distinct species. More recently, how- 

 ever, Gyllenhal, Dejean, and Latreille have regarded them as speci- 

 fically identical ; so that it will be requisite to restore the Linnaean 

 name instead of applying that of Elateroides or Flabellicornis. This 

 insect {fig. 23. 16. the male, and 23. 17. the male antennae) resides ii\ 

 decaying oak-trees, flying out of its cylindrical burrows in the hot sun- 

 shine with great agility, as I am informed by H. Griesbach, Esq., who 

 discovered them in Windsor Park. The Rev. G. T. Rudd has likewise 

 communicated to me some observations which he has made as to their 

 mode of coupling, which takes place at the mouth of their burrows, 

 the males remaining on the outside of the tree. 



In the subfamily CERoniYxiDES {fig. 24. 5. Cerophytum elate- 

 roides), the mandibles are terminated by a simple tooth, the body is 

 ovoid, the antennae are either lodged in the prosternal grooves, or are 

 exposed ; in the latter case they are ramose in the males ; the tarsi 

 are pulvillose and dilated, with the ungues denticulated {fig. 24. 6.). 

 The only British genus strictly referrible to this subfamily is Cero- 



