BY THOMAS G. SLOANE. 1289 



of the median tooth ; labrum as usual in the genus. Antennte 

 as usual in the genus, strong, filiform, last article fusiform 

 Pro thorax transversely subcordate (10 x 17 mm.), convex, 

 almost parallel on the sides, broadly lobed behind, the anterior 

 margin sinuate ; the marginal border strongl}"" reflexed, crenulate 

 on the edge, flattened and roundly advanced at the anterior 

 angles, very wide and vertical at the posterior angles, behind 

 these thickened and but slightly upturned, more prominent on 

 each side of the basal lobe than along the sinuosities before the 

 lobe ; the lobe rounded and margined ; along the anterior margin 

 a space of about l^mm. marked with closely placed longitudinal 

 striolee ; the median line distinctly marked, extending from the 

 rugose part in front to the basal margin ; the surface covered, 

 with minute scratches, these more apparent towards the sides, 

 thus rendering the lateral parts less shiny than the disc ; a lightly 

 marked transverse line across the median line near the base, but 

 the basal part of the prothorax not distinctly defined ; two 

 marginal punctures on each side, the basal one being behind the 

 posterior angles. Elytra longer than broad (23 x 20 mm.), very 

 convex, widest at about half the length, rounded on the sides, 

 considerably narrowed to the humeral angles — these well marked 

 and upturned (between them 13 J mm.) — smooth (except for rows 

 of fine punctures visible with a lens"*), the base lightly and 



* In regard to the rows of shallow punctures often noticed on the elytra 

 in specimens of various species of the Cartnkles, I now attach no value to 

 this feature for determining species. I have never taken any Carenid which 

 showed these traces of puncturation on the elytra when captured ; but 

 observations made with specimens of Carenum arenarium, 81oane, (J. 

 scaritioides, Westw. , EiUoma loddonense, Casteln., and Carenidium lacustre, 

 Macl., have showed me that the result of a lengthened immersion in 

 methylated spirits of wine is to bring out rows of punctures on the elytra 

 of all these species, though naturally they are quite smooth. iSpecimens 

 of these species which I kept for some months in spirits, on being taken 

 out, all showed rows of shallow punctures on the elytra. Unfortunately, 

 since noticing this I have never had any opportunity of collecting specimens 

 of Carenum to further experiment with. Of course these remarks do not 

 apply to Laccopterum or Epilectus. The same results happen in the genus 

 Promecodenis. 



