58 Mr. Westwood on Siagonium quadricorne, SfC. 



therefore I do not hesitate from the attention at length bestowed 

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

 them. 



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



Larva elongata, depressa * albo fuscescens, Corpore segmentis 

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

 in medio in tubum depressum producto, et processubus + duobus 

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

 culo primo longissimo, tenuique ; articuloque secundo minuto, 

 brevissimo ; (Fig. 1. B). — 



Caput horizontale. Antennce triarticulatae ? Articulo 1™° crasso, 

 cylindrico ', S""*" maximo, securiformi, setis duabus latere interior! 

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

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

 guifprmibus. — (Fig. 1. C. pes anterior.)^- 



Habitat sub cortice arborum emortuarum. 



This 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 larvae of the 

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

 losa Javanica. 



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

 Larva elongata postice attenuata, capite truncoque nigris, abdo- 

 mine griseo nigroque vario, antennis pedibusque pallidis. 



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

 ressemblent beaucoup h. I'insecte parfait;" and Messrs Kirby and Spence 

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



+ Latreille calls these "deux appendices coniques etvelus." In all the 

 Staphyliuidous larvae I have yet seen, they certainly cannot be said to be 

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

 anal processes consult the chapter on Larvae, ia the 3d Vol. of Kirby and 

 Spence's Introduction. 



