294 Mr. E. McLachlan on 



a deep cavity internally, in which lies the very slender 

 and straight penis, scarcely extending beyond the 

 lobes (c?). 



Expanse of fore-wings 11'", 



Hospenthal, Switzerland {Albert Mnller) , 1 $ . 



Remarkable for the great length of the app. sup. 



Halesus {Brusus) trifidus, n. sp. (PI. XIV. fig. 4) . 



Black. Antennce black, not annulate. Head black ; 

 occiput with two black warts posteriorly, whence spring 

 blackish hairs, and two similar warts anteriorly ; maxil- 

 lary palpi testaceous, the terminal joint fuscous. Pro- 

 thorax with long reddish-yellow hairs. Anterior tvings 

 short, the apex rather broad ; pale fuscous, thinly 

 clothed with short golden-brown hairs; fringes short, 

 fuscous ; the pale spots at the thyridium and arculus 

 scarcely evident ; neuration dark fuscous ; discoidal cell 

 rather short (scarcely longer than its footstalk) ; first 

 apical cellule long, oblique at the base, extending to one- 

 fourth of the length of the the upper surface of the dis- 

 coidal ; second short, truncate ; third and fifth longer 

 than the second, sub-acute at the base ; fourth as long 

 as the second, obliquely truncate ; posterior wings 

 smoky, the anal fringes long and grayish fuscous ; 

 pouch of the $ short, its hairs bright yellow. Legs 

 fuscous, the apex of the femora, the tibiae totally, and 

 the first joint of the tarsi, yellowish testaceous ; spines 

 black; coxge with yellow hairs arranged in two rows. 

 Abdomen dull black. 



Anal appendices of the (^ : the last dorsal segment 

 above bears an elongate intensely black plate, the 

 apex of which is somewhat produced, and on each side of 

 this is a short obtuse process (hence this plate appears 

 trifid at the apex) ; an ochreous cavity at each side to- 

 wards the apex, otherwise this segment is totally black ; 

 ap2). sup. very small, ear-shaped, yellowish ; app. in- 

 termed, lying very close together, short, the tips 

 turned upwards and black ; app. ivf. slightly diverging, 

 elongately triangular, sub-obtuse, blackish externally, 

 and clothed with blackish hairs : penis short, cylindrical, 

 testaceous, slightly notched at the tip. ( c? ) • 



Expanse of fore- wings 9'". 



Departement de TAubo, Prance, 1 r^ . 



