Trichopteryy."] CLAVICORNIA. 117 



Repton, Burton-on-Trent, Knowle, Need wood, and other Midland localities; Dunham 

 Park, Manchester ; Northumberland district ; Scotland, Forth and Solway districts. 



This species closely resembles T, atomaria, and may perhaps be a 

 small race of this latter insect, but is distinguished by its ampler thorax, 

 which is broadest before base, and is furnished with larger and more 

 closely set tubercles, and by its shorter and narrower elytra. 



T. atomaria, De G. Somewhat ovate, rather broad, convex, pitchy- 

 black, shining, clothed with rather long yellowish hairs; head large, 

 antennas rather short, yellow; thorax large, broadest at base, with small 

 remote tubercles, interspaces shining, posterior angles strongly produced ; 

 scutellum large ; elytra very slightly narrowed to apex in female, strongly 

 in male, rather deeply asperate ; legs yellow, with femora dusky ; under- 

 side black, mouth, coxse, and apex of abdomen flavescent. L. f- mm. 



In moss, haystack refuse, flood refuse, &c. ; not uncommon and generally dis- 

 tributed throughout the kingdom. 



T. brevicorniSj Mots. Very like the preceding species, but dis- 

 tinguished by having the posterior margin of the thorax trisinuate, by 

 its longer elytra, which have a more distinct fuscous tinge, and its 

 shorter antennae, which are nigropiceous ; the sculpture also is coarser, 

 and its average size is larger. L. | 1 mm. 



Several specimens were taken by Mr. T. R. Billups at Canning Town, West Ham 

 Marshes, Essex, on November 29, 1883, by shaking the bottom of a stack of radish 

 seed, but it has not been taken in any other locality in Britain ; it is common in the 

 island of Madeira. 



T. convexiuscula, Mots, (conveza, Matth.). Oval, obtuse, very 

 strongly convex, very shining, fuscous-black, sparingly clothed with short 

 pale hairs ; head largo, very broad, antennae slender, rather short, clear 

 yellow ; thorax very little dilated behind, about as broad at base as in 

 middle, with little tubercles irregularly arranged in sinuate rows, inter- 

 spaces very shining, finely reticulate, posterior angles strongly produced ; 

 elytra almost quadrate, not narrower than thorax ; legs clear yellow ; 

 under-surface nigro-piceous, with abdomen lighter, and the month, coxae 

 and posterior margins of metasternum, yellow. L. -| mm. 



Taken by Mr. Matthews in Oxfordshire ; it has also occurred in Russia. 



T. anthracina, Matth. Subovate, convex, strongly narrowed 

 behind in male, less strongly in female, deep black, very shining, clothed 

 with short grey hairs ; head large, prominent, antennae rather short,, 

 pitchy-black ; thorax very convex, dilated behind, with transverse 

 sinuate rows of large tubercles, interspaces reticulate, very shining, pos- 

 terior angles strongly produced; elytra narrower than thorax, rather 

 finely asperate, suture a little raised behind ; legs clear yellow ; under- 

 side black, with the abdomen lighter and the mouth, apex of meta- 

 sternum, and coxa 1 yellow. L. | |- mm. 



