of British Insects. 329 



out; body beneath shining black, punctate ; legs ferruginous; antennae 



the same, with the apex of the terminal joints fuscous. 



Var. j(3, with the upper surface less thickly but deeply punctate, and very 

 shining. 



Distinguished by its oblong form, glabrous body ; and having the throat, 

 legs, and antennee ferruginous. 



Taken by my friend T. C. Thompson, Esq., " in a pond 

 at Kirby Hall, near Borougbbridge, Yorkshire, towards the 

 end of August, 1831." 



4. COLYMBE^TES BRANCHIA^TUS miM. 



Oblongo-ovatus, convexus, niger, subtilissime punctato-strigosus, antennis 

 ferrugineis, pedibus fuscis, elytrisque lineola obsoleta fenestrata. (Long, 

 corp. 3 lin.) 



Small, oblong-ovate, convex, black, very finely punctate-strigose; head 

 black, with two obsolete testaceous spots on the crown ; antennae ferru- 

 ginous ; thorax as in C. aff inis ; elytra oblong-ovate, nearly linear, con- 

 vex, with, a little behind the middle, a very obsolete pale line near the 

 outer margin ; each elytron has on its disk three irregular rows of punc- 

 tures becoming scattered towards the apex, where near the suture is an 

 irregular stria of impressions ; body black beneath, irregularly strigose ; 

 two anterior legs dusky ferruginous, four posterior pitchy black. 



Differs from C. afFinis in having the four posterior legs 

 pitchy black, apparently only one very obsolete fenestrated 

 spot on each of the elytra, the anterior margin of the head 

 black, and the shape much more linear. 



Taken in " North Wales," by my friend C. Darwin, Esq., 

 in the summer of 1830. 



5. J5^'lmis rugo^sus mihi. 



Lineari-elongatus, niger, antennis pedibusque rufis, thorace bilineato, elytris 

 punctato-striatis, interstitiis rugosis, striaque elevata unica. (Long, 

 corp. f lin.) 



Linear-elongate, depressed, black ; thorax quadrate, with a curved line on 

 each side scarcely approximating in front, the intermediate space slightly, 

 and the exterior margins thickly, punctate ; the anterior margin slightly 

 rufous ; elytra elongate, depressed, punctate-striated, the striae vanishing 

 towards the apex ; the third from the margin elevated, and the inter- 

 stices rugose ; antennae and legs rufescent. 



Near to E, parallelipipedus, but may be known from that 

 species by the rugose interstices of the elytra, the absence of 

 the central impressed dot on the thorax, and in having the 

 striae not continued to the apex of the elytra, as in that insect. 



Taken at Bath, in August, 1831. 



6. Mala^chius bipuncta^tus mihi. 



Nigro-virescens, thorace toto elytrorumque apice pallid^ rufis, in ipso 

 apice punctis duobus impressis nigris, tibiis tarsisque pallidis. (Long. 

 Corp. li lin.) 



Blackish green, glabrous ; mouth pale ; thorax entirely pale rufous ; elytra 

 blackish green, with the extremity pale rufous, and an impressed slightly 

 lunate black spot very near the apex of each ; abdomen blackish ; tibia 

 and tarsi rufous, with the It^st joint of the latter black ; antennae with 



