266 



SCIENCE- G OS SIP. 



GENUS NESTICUS THOR. 



Maxillae straight. Legs very long and slender, 

 without spines, but thickly clothed with hair. 



Westicus cellulanus Clk. (Linyphia crypti- 



colens Bl.) 



Length. Male 3.5 mm., female 4 mm. 



This spider, which is our only representative of 

 the genus, is almost invariably found in dark cellars, 

 caves, or sewers. It is said to be rather uncommon, 

 but could probably be found in abundance if 

 systematic search were made. 



GENUS THERID10S0MA CB. 



Eyes closely grouped. Posterior row rather 

 strongly curved. Anterior centrals placed upon a 

 distinct prominence. Legs short, somewhat stout, 

 clothed with coarse hairs and a few slender spines. 

 Maxillae broad at their extremities. 



Tkeridiosoma argentsolnni Cb. 



Length. Female 2 mm. 



The abdomen of this beautiful spider is of a silvery 

 ;hue, tinged upon its upper side with gold. It is 

 •extremely rare. 



GENUS CYCLOSA MENGE. 



Cephalo-thorax with a transverse impression near 

 its central part. Abdomen produced posteriorly in 

 one or more protuberances. 



Cyelosa eoniea Pall. (Epeira conica Bl.) 



Length. Male 5 mm., female 6 mm. 



This spider may be easily distinguished from all 

 other indigenous species by the posterior conical pro- 

 longation of the abdomen. It spins an orbicular- 

 snare, and is not very common. 



GENUS CEROID I A THOR. 



Maxillae broad as long. Posterior row of eyes 

 almost straight. Fourth leg longest. 



Cercidia prominens Westr. {Epeira bella Bl. ) 

 Length. Male 4. mm., female 4.5 mm. 

 This rare spider is the sole British representative 

 of the genus. 



GENUS SING A KOCH. 



First leg longest. Labium wider than the length 

 Anterior eyes almost equidistant. - 



Singa sanguinea Koch. {Epeira herii Bl., 

 description only.) 



Length. Male 4 mm., female 4.5 mm. 



Cephalo-thorax warm yellowish - brown. Legs 

 yellow, marked with black. Genual joints of the 

 first pair have, in the male, each a strong tapering 

 spine. Rare. 



Singa albovittata Westr. {Epeira calva Bl.) 

 Length. Male 3 mm., female 3.5 mm. 

 Cephalo-thorax yellowish-brown, palest in front. 

 A white patch is situated behind the eyes. Rare. 



Singa hamata Clk. {Epeira tubulosa Bl. ) 

 Length. Male 4 mm., female 5 mm. 

 Cephalo - thorax dark blackish - brown. Legs 

 yellowish-brown, indistinctly annulated. The pos- 

 terior central eyes of the male are very close together. 

 Rare. 



Singa pygrnaea Sund. {Epeira anthracina + 

 E. herii, plate only, Bl.) 



Length. Male 2.5 mm., female 3 mm. 



Cephalo-thorax dark brown. Legs bright reddish 

 yellow. Abdomen brownish black with three distinct 

 longitudinal yellowish stripes. 



This species is not uncommon. 



Singa herii Hahn. 



An extremely rare species described in " Proc. 

 Dorset Field Club," vol. xiv. 



( To be continued. ) 



BUTTERFLIES OF THE PALAE- 

 ARCTIC REGION. 



By Hexry Charles Lan'g, M.D., M.R.C.S., 

 L.B.C.P. Lond., F.E.S. 



(Continued from page 237.) 

 LYCAENIDAE. {Continued,) 



PASSING from the British Isles to the Con- 

 tinent of Europe, there will be noticed a 

 great stride as regards the number of species of 

 Lycaenidae, which altogether amount to seventy. 

 The greatest increase will be seen in the genera 

 Chrysophanvs and Lycaena. The species of these 

 genera are chiefly found in the more elevated or in 

 the Alpine regions of Central Europe, in the dis- 

 tricts of the Swiss, Austrian, and French moun- 

 tains, the Balkans, -the Greek mountains, etc. 

 Some species, such as Lycaena mclanopx and 

 I. lysimon, occur almost exclusively in the Medi- 

 terranean districts of Western Europe. Several 

 genera are represented of which there are no 

 British species : these are Lacosojii*. which 

 contains only L. roboris, which has never 

 been taken except in South-western Europe ; 

 so that, according to our present knowledge, it may 

 be looked upon as one of the most locally restricted 

 butterflies in the world. Two species of the genus 

 Thcstor occur in Europe, one, T. ballus, coinmonly 

 in the South of France and Spain in the neighbour- 

 hood of the Mediterranean, and the other, T. calli- 

 maelvus, only in South-east Russia. The genus 

 Lampidcs is represented in Europe by four species. 



