?6o 



SCIENCE- GOSSIP. 



Diploeephalus cristatus Bl. ( Walckenaera 

 cristata in " Spiders of Dorset.") 



Length. Male 2 mm., female 2.2 mm. 



The caput when viewed from above reminds one 

 somewhat of Savignia frontata Bl. When seen in 

 profile, however, the bifid form of the caput is at 

 once evident. This species is the type of the genus. 



Diploeephalus perrnixtus Cb. ( Walckenaera 

 permixta in " Spiders of Dorset.") 



Length of male, 1.7 mm. 



The form of the cephalic region resembles that of 

 D. cristatus Bl. , but the projecting portions are less 

 separated. The radial joint of the male palpus will, 

 however, separate the two species without difficulty. 



Diploeephalus fuscipes Bl. ( Walckenaera 

 fuscipes in " Spiders of Dorset.") 



Length of male, 2 mm. 



In this species the caput is not nearly so deeply 

 cleft as in D. cristatus Bl. The form of the radial 

 joint is the most certain clue to its identity. 



I have received specimens of this species, as well 

 as of D. cristatus Bl. quite recently, from Mr. W. 

 Falconer, of Slaithwaite, Huddersfield. 



Diploeephalus latifrons Cb. ( Walckenaera 

 laiifrons in " Spiders of Dorset.") 



Length of male, 1.7 mm. 



The caput of this species, viewed in profile, bears 

 a close resemblance to that of D. fuscipes Bl. The 

 width of the cephalic eminence, as seen from in front, 

 however, is greater, and the radial joint of the palpus 

 is totally different, approaching in form that of D. 

 cristatus Bl. 



Bl. 



Walckenaera 



Diploeephalus picinus 



picina in " Spiders of Dorset.") 



Length of male, 1.8 mm. 



The form of the caput is very similar to that of 

 D. fuscipes Bl. The radial joint of the male palpus, 

 however, is quite different, being produced into a 

 curved prolongation which projects greatly over the 

 digital joint. 



Diploeephalus beckii Cb. 



in " Spiders of Dorset.") 

 Length of male, 1.6 mm. 



Walckenaera becki 



BUTTEEFLIES OF THE PALAE- 



AECTIC KEGtOK 



By Hexry Charles Lang, M.D., M.K.C.S., 

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



(Continued from p. 337.) 



Genus CO LIAS {continued). 

 14. C. eogene Feld. Reise Novara, p. 196, pi. 27, 



fig- 7. 



41—45 mm. 



S differs from C. thisoa in the very deep 

 reddish-orange of the ground colour, with stronger 

 purple reflection ; in the breadth of the marginal 

 borders, which are often as wide as in 0. edusa ; 



Diploeephalus alpinus {Plaesiocraerus alpinus 

 of various authors. ) 



Diploeephalus speeiosus Cb. {Plaesiocraerus 

 speciosus Cb. 1895.) 



Structural details of the last three extremely rare 

 species will be seen on reference to the figures. 



{To be continued.) 



Genera Insectorum. — Under the direction of 

 M. P. Wytsman, of 108 Boulevard du Nord, Brussels, 

 it is proposed to publish a list of all the groups of 

 insects. This appears to be a very large undertaking 

 and expensive. Full particulars may be obtained 

 from M. Wytsman. 



C. romanovi. Female. (Ante, p. 337.) 



also in the neuration, which is blackish, as in 

 C. aurora. Disc, spot f.w. not rounded, but narrow 

 or semi-lunar ; that of h.w. large and bright orange. 

 H.w. deeply shaded towards base and in. marg. 

 o. differs from C. thisoa in the darker and less 

 brilliant orange of the ground-colour, the marginal 

 borders of both wings are less strongly defined on 

 their inner edges. The spots are more numerous, 

 more regular, and of a more orange-yellow tint. 

 nearly approaching the ground colour. The disc, 

 spot of h.w. is more pyriform than circular in out- 

 line, and of a brighter orange than the rest of the 

 wing. As in the case of C. thisoa $ , the h.w. are 

 liable to be very deeply shaded, so that the ground 

 colour in some specimens is almost black, obliterat- 

 ing the marginal band and spots. The fringes in 

 both sexes are brilliant rosy red. U.S. differs 

 considerably from that of C. thisoa. F.w. bright 

 orange, marginal border and costa being light 

 green, disc, spot small and white-centred, a trace of 

 a row of sub-marginal spots. H.w. rich yellowish - 

 green, with a trace of a sub-marginal row of dark 

 red spots. Disc, spot small but brilliantly silvery- 

 white, edged with reddish-purple. Neuration 

 whitish, especially in $ , fringes bright rose colour. 

 Hab. Turkestan, the Himalayas, and Southern 

 Thibet ; always at considerable elevations, from 

 11,000 feet and upwards. VII.— Till. 



a. var. theia Stgr. MSS. Cat. 1882. Somewhat 

 smaller than the type, and much paler in the 



