1970.] 223 



As Dr. StSl says, the Bpecics is very like T. agrestis, but it is 

 always much larger, the testaceous colour on the upper surface lighter 

 and clearer, the ai;teuna3 more than proportionately longer, and the 

 pronotum comparatively wdder posteriorly. The habits and habitats 

 are also different ; for, whereas agrestis is found hiding among moss 

 under bushes in the open country, dispnr runs about in the daytime 

 in woods. T. agrestishaxiug all the parts of the elytra well developed, 

 I cannot consider T. dlspnr to be the macropterous form of it, as has 

 been suggested. 



GEEEIDINA. 



Gerets aspera. 

 Rgdromefm aspera, Fiob., Eur. Ilcm., 108, 8 (18G1), J. Sahib., 

 Not. Fenn., xiv, 251, 5 (1875) ; Livmotrechus asper, Stal, Of v. Vet. Ak. 

 Forh., 397, 12 (1S6S) ; Hgdrometra lacustris, var. c, Zett., Ins. Lapp., 

 282, 2 (1840). 



<J . Black. Mead quadrangular, smooth, posteriorly with a small, elongate fovea 

 near each eye, apex fcmiginous. Aniennce black, 1st and 2nd joints obsciiro-rufous, 

 1st longest, 3rd shortest, 2nd slightly shorter than the 4th. Rostrum piceons, 2nd 

 joint ferruginous on the apical half. Pronotum: anterior portion smooth, hindwardly 

 constricted and lobate, its sides somewhat roimdcd, incrassate ; the disc depressed, 

 with a wide middle keel ; anterior margin with a small obtuse tubercle behind each 

 eye ; the rest of the pronotum, except the sides, obscure-rufous, coarsely punctured 

 and anteriorly crcnatc, the middle with a slight longitudinal keel ; the sides posteriorly 

 raised into a long tubercle, opposite to which, on the disc, are two, very slight, trans- 

 verse elevations : scutellar process with its posterior margin broad, flat, rounded and 

 deeply punctured, the undercurved sides with a yellow vitta under the tubercles, in- 

 distinctly continued forwards. Ulytra as long as the abdominal segments, black-brown, 

 finely crenulate, anterior margin black (very often hyaline with black nerves, Sahib., 

 1. c). JFtw^s hyaline, whitish, slightly infiimated towards the apex. Sternumhl&c^i, 

 silvery-sericeous, with a wide, deep, longitudinal channel, anterior to each Isfc coxa a 

 broad, ferruginous vitta ; sides next the pronotum broadly nude, with a posterior silvery 

 streak. Lfgs : coxcb and trochanters all pale ferruginous beucalh ; thighs, 1st pair 

 black, broadly bright fciTuginous beneath; 2ud and 3rd pairs dull feiTuginous, paler 

 beneath ; tibice and tarsi dark ferruginous. Abdomen black, connexivum yellowish, 

 with a black line on the margin ; imdcr-side silvcry-ecriccous, disposed somewhat in 

 vittaj ; the 6th segment beneath, posteriorly and on the sides yellowish, tlie posterior 

 margin deeply and roundly excised. Qenital segments underside ; — the 1st, at the 

 base, compressed at the sides, yellowish, the posterior margin in the middle straight, 

 tlu'u carried on to a point at the sides of the 2nd, which is dark ferruginous, convex, 



posteriorly rounded, and with a distinct, much-jjrojectiiig tubercle near its base. 



Length, l^ lines. 



( ^ . Tubercles of the pronotum more obsolete, 6th segment of the abdomen 



beneath, posteriorly slightly emarginato, and the let genital segment obliquely 



depressed at each side. iSahlb., 1. e.) 



