1892.] 



sanguincn, Jhyamis luvida and airicilla. All these have the basal joint 

 of all the tarsi widened in the male. The males of the following 

 genera have the first two joints of the anterior tarsi dilated : Paiidgrpjis, 

 all the Bembidiid re {except Tachys Focki and quadrisignatus which have 

 no dilated joints), Patrobiis, Trechus, Licinns, Pogonus, at least two 

 species of Trichoptcryx (brevipennis and Kirbyi, which latter has also the 

 basal jomt of the posterior tarsi dilated). Olibvus corficnlis and 

 liquidiis have the second joint of the male anterior tarsi dilated. 

 LaccobiiLs and Bevosus have the second and third joints, but not the 

 first, dilated. A great number of species have the three basal joints 

 of the front feet widened, as examples may be mentioned : (Genera) 

 Cicindela, Lonceva, Leistus, Ncbria, Pterosticlius, Auiara, CalatJius, 

 (except picetLs in which the tarsi are simple in both sexes), Liodes, 

 Chrysoniela (most), Timarcha, Lina and Heliopathes. The Harpalid^e, 

 and the genera Carabus, Calosoma, BLcthisa, etc., have four joints of 

 the anterior tarsi dilated in the male, while in the genera Harpalus. 

 and Anisodactylus, and in Helops pallidus and striatus, the four basal 

 joints of the intermediate, as well as the anterior feet are widened. 

 In Anisodactylus these widened joints are furnished with a thick brush 

 of hair beneath, and many species have these joints clothed with long 

 or short hairs. The whole anterior tarsus is dilated in the males of 

 most of the Hydradephaga (where also it is frequently the case that 

 the middle tarsi are also widened, while in Hydroporus Jiavipes, Agahtis 

 arcticus, and A. sturmii, the posterior feet alone are dilated) ; in the 

 species of Sphceridium (where the last joint is curiously bent longitu- 

 dinally), Conosonia, TacJiyporus, Tachiniis, Megacroinis (M, incliiians has 

 also the basal joint of the intermediate feet dilated), most of the 

 Staphylinidae and Quediidce, Necvoplioviis (with a thick brush of red or 

 yellow hairs beneath), many species of Choleva (also the hrst joint of 

 the intermediate feet in the sub-genus Ptoniaphagus), Meligetlies 

 (especially in M. pcdmatus, Er.), some CvyptopJuigus, Ciytiis amtattis, 

 Goiiioctena, HeliopatJies, etc., etc. AphoditLs tvistis has the posterior 

 tarsi dilated, flattened and hairy in the male. Gnorimiis has four 

 joints of the male anterior tarsus thickly clothed with a brush of 

 yellow hairs. The males of Malachiiis nificollis and pulicarius have tiie 

 second joint of the front leet produced obliquely at the apex, a 

 character which has caused their separation as a distinct genus 

 (Axinotarsus.) The fourth joint of the males of the genus Stenolophus 

 is deeply bi-lobed, while the same joint in Acupalpns is deeply notclied 

 at the apex. The dilated joints of the anterior tarsi of the males of 

 the Dytiscida^— including AcUius and Hydnticus, form a circular disc 

 v/hich is studded wdth suckers — a familiar object ith the microsccpist- 

 The male of tlie large water-beetle llydroiis picciis has the last joint of 

 the front tarsus furnished with a large triangular j^late, while in the 



