COLEOPTERA, 367 



upon it, and by a see-saw motion of their head precipitate it to the 

 bottom of the hole. Thither also they quickly retreat on the least 

 intimation of danger. If they are too confined, or the soil is not of 

 a proper nature, they construct a new habitation elsewhere. Such 

 is their voracity that they devour other larvae of the same species, 

 which have taken up their abode in their vicinity. When about to 

 change their tegument or to become pupae, they close the opening of 

 their cell. Part of these observations were communicated to me 

 by the late M. Miger, who had carefully studied many larvae of 

 Coleoptera, and discovered several which had escaped the researches 

 of naturalists. 



C. campestris, L. ; Panz., Faun. Insect, Germ. LXXXV, Hi. 

 About six lines in length ; grass-green above ; labrum white, 

 slightly unidentated in the middle ; five white points on each 

 elytra. Very common in Europe in the spring. 



C. hybrida, L. ; Panz., Ib., iv. Two crescent-shaped spots, 

 and a white band on each elytron ; one of the spots at the exte- 

 rior base and the other at the end ; suture cupreous. In sand- 

 pits, never mixing with the campestris * (a). The 



C.permanica and some other species have a narrower and 

 more elongated form, and seem to constitute a particular sec- 

 tion. The germanica, unlike the preceding, does not fly when 

 about to be seized but escapes by running, which it does with 

 great speed. M. Fischer, in his Entomography of Russia, has 

 placed a Brazilian species ( T. marginatus) in the subgenus 

 Therates. 



All these species are winged; but some apterous ones are 

 known whose abdomen is also narrower and more oval, and in 

 which the tooth of the emargination of the mentum is very 

 small and hardly sensible. Such is the one figured in our Hist. 

 Nat. des Coleop. d'Europe, I, i, 5, under the name of coarctata. 

 Count Dejean, Spec. Gen. des Coleop., II. p. 434, has formed a 

 new genus with them, that of Dromica (D). 



Sometimes the body is long and narrow, the thorax elongated, in 

 the form of a knot, narrowed before ; the third joint of the two 

 anterior tarsi of the males pallet-shaped, and projecting internally ; 

 the fourth is inserted exteriorly near its base. 



CTENOSTOMA, King. CARIS, Fisch. 

 Tins subgenus appears to be peculiar to the intertropical regions of 



Add, Cicwdela fyhatica, L. ; Clairv., Entom. Helv., II., iv., A ; C. simaia, 

 Fab. ; Clairv. f Ib., B, b ; C. germanica, L. ; Panz., Faun. Insect. Germ. VI, v. 

 For these and other European specie*, the Hist. Nat. des Coleop. d'Eur. of Lat. and 

 Dej., fascic. I, p. 3T, et seq. and in general the Species Gener. of Count Dejean ; 

 see also the work of Curtis on English Insects. 



03* (a) Add the C. wucofer, 6-yn//a/o, rugtfrmu, patruela, cotccntcuua, signata, 

 blanda and the C. kpida, Le C., no*, spec. ined. ; the C. obliquata, rcpanda, albo- 

 hirta, latirincta, formosa, marginata, raricyata,**ipu*ctata, marginipennis, abdominal*, 

 12-jru/fa/a, yfrxuosa, obscura, pusilla, puncfata, pulchra, and the C. denticufota hamor- 

 rhoidalis and spkndida, new species of HeuU, ENU. ED. 



