58 Mr. Westwood on Siagoniitm quadricorne, Sfc. 



therefore I do not hesitate from the attention at length bestowed 

 on the larvaj of Coleoptera, to subjoin a description of one of 

 them. 



Siagonium quadricorne. (Plate II.) Fig. 1. A. Larva aucta. 



Larva elongata, depressa * albo fusrescens. Corpore segmentis 

 duodecim, transversis, sub-pilosis ; niediis latioribus ; ultimoque 

 in medio in tubum depressum producto, et processubus + duobus 

 lateralibus, tubo caudali loiigioribus, biarticulatis, instructo ; arti- 

 culo primo lougissimo, tcuuique ; articuloque secundo mitiuto, 

 brevissimo ; (Fig. 1. B). — 



Caput horizontale. ^Mfewna? triarticulata? ? Articulo 1™" crasso, 

 cylindrico; S""'" maximo, securiformi, setis duabus latere interiori 

 instructo ; 3° que minuto, clavato — (Nota. Si articulus alius, bre- 

 vissimus est et basalis.) Pedes breves, Tarsis exarticulatis un- 

 guiformibus. — (Fig. 1. C. pes anterior.) — 



Habitat sub cortice arbor um emortuarum. 



Tliis description of the Larva of Siagonium may serve as the type 

 of MacLeay's family Omalidce ; and in order to show the differ- 

 ences existing between the Larvae of this and another of his 

 families, I here subjoin a description of one which I had con- 

 ceived to be the young of Goerius olens, but which Mr. Kirby 

 recognized as belonging rather to Philonthus politus, or one of its 

 affinities, and which will serve as the type of the larvEe of the 

 family Staphjjlinidce^ as restricted by Mr. MacLeay in the Annu- 

 losa Javanica. 



Philonthus politus ? Larva aucta. (Fig. 2. A.) 

 Larva elongata postice attenuata, capite truncoque nigris, abdo- 

 mine griseo uigroque vario, antennis pedibusque pallidis. 



•* Latreille observes on the Brachelytra (Regno An. iii. 217) " Leurs larves 

 ressemblent beaucoiip k I'insecte parfait;" and Messrs Kirby and Spcnce 

 (Introd. iii. 109) have made a similar remark. 



+ Latreille calls tliese "deux appendices coniriues ct veins. " In all tlie 

 Staphylinidous larvte I have yet seen, they certainly cannot be said to be 

 " veins," a few hairs only being visible on their surface. For the use of these 

 anal processes consult the chapter on Larvie, in tlic 3d Vol. of Kirby and 

 Spence's Introduction. 



