NOVITATES ZOOLOUICAB XXII. 1915 337 



55. Hydrelia unipecten sp. nov. 



(? ? , 29-35 mm. Extraordiu.arily like large specimens of //. flnriroma Warr. 

 (yov. Zool. vi. 296, section Asfheiwtricha) and H. inutilis AVarr. (ibid. viii. 2U0), 

 sometimes hard to distinguish except that the male antenna bears very long, 

 slender, curved, nniseriate pectinations, on which acconnt it will constitute a new 

 section of the genns.* From flan'coma the <? also differs in lacking the secondary 

 se.xnal hair-pencil. Such further distinctions as I have been able to discover 

 depend upon small points not brought out in Warren's diagnoses, so that it is 

 necessary to include them here. Face darker fuscous (only so in fuscous-winged 

 aberrations of fiavicoma, such as are unknown in unipecten). Abdomen nearly 

 always with distinct jiaired dark dorsal spots on the anterior segments. Coloration 

 on an average redder, varying from light fleshy brownish to strong, deep rufescent 

 (in the allies from fleshy brownish to brown and fuscous) ; discal dots always 

 strong, on an average (especially on the hindwing) larger than in the allies ; 

 median area generally (in them very rarely) much narrowed at hindmargin, liere as 

 a rnle darkened ; postmedian line more lunnlate-dentate and not (as mjlaiyconm) 

 incurved between the radials ; ill-defined, not being followed (as in it) by a fine 

 pale yellowish or whitish line; terminal line stronger (usually obsolescent in 

 ffaKicomn, and inutilis), markedly thickened between the veins or forming rather 

 conspicuous dots. Hindwing slightly more elongate costally. 



Underside rather less pale. 



British East Africa : E. slopes of Aberdare Mountains, 7000^8500 ft., 

 February 24-26, 1911, 26 SS, including the type ; VV. slopes of Mount Kenya, 

 5000—8500 ft., February 26, 1911, 2 6 S ; S. and E. slopes of Mount Kenya, 

 5000—7000 ft., February 8, 1911 ; all in coll. Brit. Mus., collected by 

 S. A. Neave. 



The ? must be sluggish or retiring, and the remarkably modified <S antenna 

 is probably connected with the matrimonial ipiest. 



56. Epirrhog achatina sp. nov. 



S , 28 mm. Face with loose tuft of projecting scales on lower part. Palpus 

 moderate, stout. Antenna closely lamellate, pubescent. Head and body con- 

 colorous with forewing. 



Forewing normally shaped (or somewhat narrower than in tlio tyjjical — 

 alternafa Miill. — European group), glossy ; whitish ochreons, slightly irrorated 

 with ferruginous ; basal area slightly darkened costally and marked by a red-brown 

 spot at base and three excurved and crennlate red-brown lines, the outermost the 

 thickest and placed at about 2 mm. from base ; succeeding area traversed by three 

 crenulate ferruginous lines, the first rudimentary, the third very slender ; median 

 area 5-6 mm. wide at costa, 3 mm. at hindmargin, bounded by fine white lines, its 

 edges crenulate, the distal shaped about as in XaiUhorhoi'. apadicearin, Schiff. ; its 

 proximal and distal i)arts sliglitly darkened, the former with three approximated 

 brown lines (the middle one the weakest), the latter with four (the third somewhat 

 blurred, inclining to coalesce with the fourth), its central part delicate pinkish, 



* Kovwnin Pears., Can. Ent. xx.\vu. 12(5, lias tlie discoceUulars of both wings biangulate; moreover 

 the pectinations are scarcelv more than nniseriate teeth — more recaUing those o£ Ilijdrdia dcntntlssima 

 Warr. (^Nov. Xmtl, vi. 34). If not, as I believe, a valid genus, it would tall into Vmiisia. 



