4 Chr. Aurivillius. 



with pale blue, but the ground-colour is much paler than in the 

 male or the female of typical malathana. Nilotica is perhaps the 

 extreme dry season-form of malathana, in which case the typical 

 form may be found at the White Nile in the wet season. 



14. Cupido eleusis Demais. 2 99. — Khartum, 31 th January. 



Fam. Pieridae. 



15. Herpaenia eriphia God. var. hib. extrema straminea n. var. 

 Parva alis supra stramineis signaturis nigris imminutis, an- 



ticis vitta lata cellulse discoidalis pallida, interdum cellulam fere 

 totam implente, posticis ad basin haud aut vix nigris et fascia 

 nigra subdiscali angusta aut fere deleta, alis posticis infra lute- 

 scentibus aut pallide brunnescentibus signaturis plus minus ob- 

 soletis. — Long. alar, exporr. 31 — 38 mm. 2 oV. — Kaka and 

 Gebelein, February and March. 



Most nearly allied to the South African 

 dry-season form Nyassae Lanz, but much 

 smaller and with the black markings of 

 the upper side very much reduced. There 

 are also no traces of the reddish-brown 

 colour at the margin of the wings on the 

 Fig. l. upper side or on the under side of the 



Herpaenia eriphia God. hind wing, which is so conspicuous in 



var. hib. straminea Aim. om> specimens f N yassm f rom Damara- 



land. Straminea has all the characters of an extreme dry-season 

 or a desert form of the species. 



16. Pieris gidica God. var. Westwoodi Wallengr. 1 a\ — 

 Gebelein, March. 



17. Pieris gidica God. var (?) abyssinica Lucas. 2 oV. — 

 Eenk, 21 th February. 



These twt^ males agree in colour and markings of the upper 

 side completely with the male of Weshvoodi from Gebelein. It 

 is very remarkable that Weshvoodi also was taken in the dry 

 season at nearly the same time as abyssinica. The relation 

 between P. Westwoodi and abyssinica has been the subject of 

 much discussion and is not yet sufficently cleared up. Butler 



