Mr. Westwood on the Genus Staphi/linus. 305 



length of the Larva of the Aleochara, but proportionably narrower, 

 and is nearly equal in size to the smaller female specimens of the 

 perfect insect. I have again met with the Larva in considerable 

 quantity under the bark of decaying felled trees in Kensington 

 Gardens, at the beginning of the present mouth. 



In the 10th volume of the Annales des Sciences Naturelles, 

 there is described and figured an Insect of this genus, found near 

 Versailles, (which is said to be extremely rare), under the name 

 of Prognathus rufipennis. The specimens described by M. H. 

 Blondel were found by him under the bark of a dead poplar tree, 

 and in consequence of M. Latreille's having communicated to 

 him the description of a specimen of Siug. A-corne^* transmitted 

 by Dr. Leach from England, M. Blondel has been enabled 

 to compare and determine their apparently specific variations, 

 although he is not enabled to speak with certainty upon the sub- 

 ject, from not having seen the identical British specimen. From 

 the figure indeed we may be led to suppose that he has only de- 

 scribed the female of the Slag, quadricorne, and should the speci- 

 men transmitted by Dr. Leach to M. Latreille have been a male, 

 it will be more than probable that such will prove to be the case. 



Nicolai, in his " Dissertatio inauguralis medica sistens Coleo- 

 pterorum species Agri Halensis," has fallen into an error, both in 

 regard to the generic and specific characters of Siagonium quadri- 

 corne. He says, *' Oxytelorum species aut in littoribus arglUa- 

 *' ceis et arenosis lacuum, cuniculos talparum instar fodientes, aut 

 *' locis humidis, in fimo, in truncis vetustis, &c., iaveniuntur. Fos- 

 " sores familiam propriam vel sub-genus peculiare, {Siagonium, 

 " Kirby,) corpore convexiore, thorace capite manifeste latiore dis- 

 " tinctum, constituere videutur." 



" A. F0SSORES.+ 

 " Omnes ad littora lacus salsi habitant. 

 « 1. O. tricornis. Gyll. 



* Reference is made to the figure of this Insect, given by Messrs. Kirby and 

 Spence, under the incorrect generic name of Siagona, Hence has arisen the 

 idea entertained by the French Entomologists, that Mr. Kirby's generic name 

 should be changed. 



t The other section, containing the true Onialia, he terms Coprophagi. 



