328 NoviTATKs Zooi.ocacAK XXI. lUH. 



Victor Faroiilt sunt. IViOcJd'iiuJ IS ? ? taken iu the mouths of iSejiteiiibur, 

 October, and November 1012-1013. 



144. Derthisa trimacula hispana (Boisd.)- 



Ephemu tninacuhi var. hi.ipaiu Boisduval, Icon. Hist. Lrpiil., vol. ii. pi. 72. ff. 4, 5 (1832) (Spain). 



Derthisa triiimoda Scbiff. is one of the most variable species ; but althongh 

 I believe the typical form lias been taken iu Mauritania, it is quite certain that it 

 does not occur in that part of the " Hants Plateaux " in which Guelt-es-Stel is 

 situated. Although very variable inter se, there are three well defined groups of 

 aberrations corresponding to the European trimacidn, (/runeri and glaudiia ; they 

 will have to stand as trimacula kispana, ah. hixpaiia, ah. alhid.a, and iih. rosea 

 ab. nov. 



Of the ah. Iiispuna Faroult sent CO^cJand IS?? from September and 

 October, and 3 ? ? from November 1912-1913 ; of the ah. alhida 41 cJc? and 6 ? ? 

 from October and 'i S S and 2 ? ? from November 1012-1913; of the much rarer 

 ah. rosea he only sent 1 ? from September, 12c?c?and 1 ? from October, and 

 1 ? from November 1012-1913. In addition to which there is a cJ agreeing most 

 nearly with the Eurojiean a6. ««?'eo^or, and another, a ?, like ab. alhida, but the 

 two stigmata and fringe are orange buff, not black. 



145. Derthisa magnifica sp. nov. 



S. .Antennae strongly pectinated pale cinnamon ; head and thora.\ pale 

 cinnamon powdered with grey ; abdomen bnffy snljjhur yellow. Forewing : Ij-.isiil 

 two-thirds pale cinnamon densely powdered with dark grey scales, a basal bhick 

 streak and a snbbasal smear of black scales on and below vein 1 ; orbicular stigma 

 white with central cinnamon dot and a narrow outer black liair-riug ; reniform ill 

 delined outwardly, basally white with black edge; jjostmedian double, very zig/.ag 

 and narrow dark and light line ; inner two-thirds of outer third of wing 

 cinnamon with a few scattered blackish smears, outer third lavender grey, 

 separated from the inner two-thirds by a /.igzag white line with sagittate points 

 tipped with black running into wing ; fringe cinnamon brown with buff chequers. 

 Hindwing white; an indistinct grey stigma and grey terminal hairline. 



? . Similar, bat reniform almost entirely white, the lines and bauds sharper 

 and hindwing clouded with grey. A second c? is almost entirely grey, and 2 ? ? 

 are very dark. 



Length of forewing, c? 15-19 mm., ? 19-22 mm.; expanse, (? 36-46 mm., 

 ? 46-52 mm. 



6 cJ J and 7 ? ? , October and November 1013, sent in by Victor Faroult. 



1 46. Derthisa affinis sp. nov. 



$. Allied to D. magnifica ; differs in forewing by having a subliasal wliite line, 

 a double white and black antemedian line, a crenulate double black and white post- 

 median line, and a strong zigzag double black and wliite subtermiual band. The 

 hindwings are clouded and banded with grey. 



Length of forewing 17 mm. ; expanse 39 mm. 



1 <S, October 1013, Victor Faroult. 



