STAPHYLINIDyE. 45 



4th much narrower, about half the size of the 5th ; it may further be 

 known by the more densely punctui-ed and duller hind body, and the 

 fact that the basal depressions of the first four visible segments are 

 finely punctured and not rugose as in C. nigrita ; G. jrotensa and 

 C, yiigrita are distinguished from all the other species of the genus by 

 their longitudinally channelled thorax {y. Champion, Ent. Mo. 

 Mag. xliv. (2 Ser. xix.), l'J08, 225). 



C. rufescens, Kraatz, Naturg. Ins, Deutsch, ii. 144. Very 

 closely allied to C. riparia, but somewhat smaller on the average and 

 more brightly coloured ; pitchy-brown or rufescent, with the head and 

 the hind body (except the apex and the hind margins of the segments) 

 pitchy-black ; the colour, however, is variable. Antennae and legs 

 brownish-red ; the fifth to the tenth joints of the antennse are more 

 strongly tranverse than in C. rijKiria, and the fourth is plainly narrower 

 than the fifth ; in C. riparia these two joints are of about equal 

 breadth ; in the last-mentioned species the abdomen is sparsely punc- 

 tured upon the first four segments, more densely so upon the fifth, 

 while in 6', rufescens the abdomen is densely and sub-uniformly punc- 

 tui-ed. L, 2§- - 3 mm. 



Sandown, Isle of Wight (Champion); Colchester (Harwood). This 

 species is introduced by ]\tr. Champion (Ent. Mo. Mag. xlv. (2 Ser. xx.), 

 I'JOD, 52), who says that -it is probably mixed with C. riparia in our 

 collections; the difi'erences, as described, seem hardly to warrant their 

 separation. 



LOMECHUSA, Gravenhurst. 



L. strumosa, Grav., Micropt. 91; Gyll. Ins, Suec, ii. p. 371. 

 Ferruginous, with the elytra mouth, 'parts and legs lighter, and the 

 head, the base of the middle or of all the segments of the hind body 

 dark brown or blackish ; the colour, however, is somewhat variable and 

 is sometimes almost uniform ; form oblong, rather broad and not con- 

 vex ; head small, antennae stout, but scarcely thickened from the first 

 basal joint, which is broad ; joints five to ten not transverse ; thorax 

 sti-ongly transverse, explanate and I'aised at the sides, disc shining and 

 comparatively smooth, sides duller with obsolete granulations, posterior 

 angles produced ; elytra short, very finely punctured ; hind body slightly 

 rounded at the sides, smooth and shining on disc, with strong yellowish 

 pubescence especially at the sides and towards base ; legs strong and 

 stout with slender tarsi. L. 5| — 6mm. 



This fine species, which has been looked for for many years, is one 

 of the most interesting, if not the most interesting capture recorded 

 in this supplement. The previous records of its occurrence in Britain 

 are one specimen taken by Sir Hans Sloane on Hampstead Heath in 

 1710, and a second captured by Dr. Leach while travelling in the mail 

 coach between Cheltenham and Gloucester, Both the specimens are in 

 the British Museum, but the insect has long been omitted from our 

 lists. It was rediscovered by Mr. Donisthorpe on May 25, 1900, in 



