Trichopteryx.'] Clavicoknia. 117 



]{i'ptoii, Hurton-ou-Treiit, Knowle, Needwooil, ami otluT Mullaiid localities!; Duuluim 

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



This species closely resembles T. atcmar/'a. and iDay perhaps he a 

 small race of tliis latter insect, but is distinguisluHl by its ampler thorax, 

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

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



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

 black, shinin,L;v, clothed with rather long yellowish hairs ; lioad large, 

 antennre 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, coxa?, 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. brevicornis, Mots. A-^ery 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 coarsei', 

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



Several specimens were taken by IMr. 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, (convexa, 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 ciliated behind, about as broad at base as in 

 middle, Avith 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 ; 

 nnder-surface ni>iro-piceous, with abdomen lighter, and the mouth, coxae 

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



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



T. antbracina, Matth. Subovate^ convex, strongly narrowed 

 liehind in male^ less strongly in female, deep black, veiy shining, clothed 

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

 pitchy-black ; thorax very convex, dilated Ijchind, 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? yellow. L. |-|^ mm. 



