53 INSECUTOR INSCITI^ MENSTRUUS 



of the clasper is prolonged as in the allied forms, the tip form- 

 ing a distinct hook; the setae are concentrated along the ter- 

 minal margin, very stout and spatulate; the limb bearing the 

 spine is bent down, its inner margin reversely fimbriate. 



Types, No. 23928, U. S. Nat. Mus. ; one male and four fe- 

 males, Lomagundi, November, 1909, one female, Lorenzo 

 Marquez, Portuguese East Africa, November 7, 1909 (C. W. 

 Howard). 



These species, placed in Ochlerotatus by Edwards, are allied 

 to vexans Meig., and with it fall in the subgenus Bcculex Felt. 

 The type of Ochlerotatus being confirmatus L. A. {=scapularis 

 Rond.), it is the same as Heteronycha as used by me. 



NEW SPECIES OF HETEROCERA FROM 

 SOUTH AMERICA 



(Lepidoptera) 

 By WILLIAM SCHAUS 



Family PHALAENOIDIDAE 



Diamuna grandimacula, new species. 



Male. — Palpi and head dark reddish brown. Collar and 

 thorax chestnut brown, the patagia tipped with fuscous. Ab- 

 domen above fuscous brown, the anal segment fuscous gray; 

 a dorsal chestnut brown tuft at base; abdomen below similar 

 with long sublateral tufts. Fore tibiae and base of tarsi with 

 long dark brown and black tufts; mid and hind femora with 

 orange brown hairs, the tibiae brown and fuscous, the tarsi 

 black. Fore wings dark purple tinged with brown ; a fine 

 black streak through cell to postmedial line ; a triangular dark 

 reddish brown velvety spot antemedially below cell, its base 

 resting on median vein followed at cell by some pale reddish 

 brown shading and a dark vertical streak ; a fuscous streak at 

 base of inner margin followed by lighter shading; a dull brown 

 streak on costal margin ; faint indications of an oval spot on 

 costa, followed by some lilacine irrorations ; post-medial line 

 remote, brown black, outcurved from costa to vein 4, then 



