Potajninus.] clavicornia. 3SI 



several from North America ; the New World species are remarkable for 

 being covHred with stony inc;rustations ; they closely resemble Parnus, 

 but may be known superficially by their longer legs and the absence 

 of engraved lateral thoracic lines ; our single species is a very scarce 

 insect, ami most of the specimens in our collections have been taken 

 in the Dove in the same locality as Macronychus. 



P. substriatus, Mull. {Dryops Dumerilii, Latr. et auct.). Of the 

 same shape as Parnus prolifericoniis, but a little more convex, dark 

 reddisli-brown, with the head and thorax darker, sometimes pitchy-brown 

 or almost pitchy-black, the thorax being lighter at margins ; the wholo 

 surface, especially of the elytra, is covered with very thick yellowish, 

 almost golden pubescence, which is often less evident on thorax ; antennas 

 very short; thorax a little narrower than elytra, broader than long, with 

 sides only slightly rounded and rather strongly margined, very thickly 

 and finely punctured, anterior angles produced ; scutellum rather large ; 

 elytra convex, with distinct finely punctured strise, interstices somewhat 

 raised ; under-side red-brown ; legs long, reddish, with femora darker. 

 L. 4-5 mm. 



Under clods submerged at the sides of streams, and under submerged stones, but not 

 apparently under stumps or lojjs ; rare ; River Dove, near Burton-on-Trent ; Scar- 

 borough; banl<s of Wandle near Garrat Green and in Yorkshire (Stephens). 



PARNUS, Fabricius {Dry ops, Olivier nee Leach). 



This genus contains sixteen species, of which all are found in the 

 Mediterranean region except one which has been recorded from Brazil ; 

 other species, however, exist in Tropical America which have not been 

 described ; according to the Biologia Centrali-Americana, the New 

 World species all have the second joint of the antennee much less 

 developed than is the case with the European species, and the club 

 consists distinctly of nine joints, whereas in the Old World species only 

 seven or eight can be distinguished ; this character, however, cannot be 

 regarded as generic, as the point still appears to be disputed, some 

 authors considering our species to have the antennae 11-jointed, 



I. Elytra very finely punctured, with scarcely any traces 



of strise ; pubescence yellowish-grey P. Prolifericobnis, F. 



11. Elytra more or less strongly and distinctly punctured. 

 i. Elytra with traces of strise at base only; pubescence 



(]aVk P- AUEICTJLATDS, PaiiZ. 



ii. Elvtra with strise complete and distinct; pubescence 



greyish !*• ALGIEicus, Lucas 



(striatellus, Fairni.). 



iii. Elvtra without trace of stria; pubescence golden- 

 yellow P- NiTiDULiis, Heer. 



P. prolifericornis, F. Elongate, subcylindrical, very finely punc- 

 tured fuscous black, thickly clothed with short erect, yellowish-grey 



