ITS MANDIBULATA.— COLEOPTERA. 



that it Tvas usually found with wings, while its congener, CI. Fossor, was 

 mostly destitute of those appendages ; it has also been said that the species 

 may be distinguished by their presence or absence alone ; but from recent 

 observation I have remarked that CI. Fossor is, as I have before stated, nearly 

 as frequently winged as apterous, notwithstanding which, its superior size 

 and dissimilar colour and form well distinguish it from the other species. 



With respect to the alation of geodephagous, and other insects, much might be 

 said ; but my hmits preclude the possibility of adding more than the few 

 following examples as proofs of the insufficiency of that character alone being 

 diagnostic of species ; the most that can be alleged is, that certain species 

 have a greater tendency to be apterous than others, and vice versa : e. g. 

 Omaseus nigrita is generally winged, but I have several examples taken lately 

 that are perfectly apterous : again, Calathus crocopus is usually apterous, but 

 many of the specimens taken on the banks of the Tees have ample wings : 

 the same may be added of Acheniimi depressum, which is said to have mere 

 rudiments of them ; whereas the supposed males appear perfectly apterous, and 

 amongst the females which I have examined are many with rudiments only, 

 others with those appendages of greater bulk, and some with large and ample 

 wings : these latter instances are evidently analogous to similar occurrences, 

 amongst the Hemiptera, such as Lygaei micropterus et apterus, Hydrometra 

 stagnorum, &c., which have also been found with ample ones. 



Page 41. f Sp. 1, b. Dyschirius seratus. JEneus, antennis et pedibus nigro- 



piceis. (Long. corp. 2| lin.) 

 Dy. aeratus mihi. — Steph. Catal. p. 7. IVo. 47.* 

 " Mandibles rufo-piceus : front rugose impressed ; thorax lightly channelled, 



the sides much rounded : abdomen oblong-ovate : elytra punctate-striate, the 



punctures vanishing before the apex, body beneath blackish: wings long, 



whitish hyaUne, stigma pale brown." — Zool. Journ. 



" Inhabits banks of pools near Holy wood, in the county Down, in the cracks 

 left by the drying of the slime, and, when the sun shines, running on the 

 surface." — Mr. Haliday. It may not be distinct from some of the foregoing 

 species of Dyschirius. 



Page 45. Cychrus rostratus. " Not uncommon during great part of the year, 

 in Northumberland." — G. Wailes, Esq. 



Page 47. Procrustes coriaceus. I am informed that Mr. Edwards possesses a 

 specimen of this fine insect, which was taken alive near Portsmouth. 



Page 49. Carabus monilis. " Not uncommon near Harrowgate, Yorkshire, 

 but not as yet found at Newcastle." — G. Wailes, Esq. 



Page 51. Carabus arvensis. " Common on heaths, in Northumberland." — 

 G. Wailes, Esq. 



Page 56. Carabus nitens, " Common on heaths, in Northumberland." — 

 G. Wailes, Esq. "Near Carlisle, 26th May last."— T. C, Hci/sliam, Esq. 



