4 



SECOND YARKAND MISSION. 



Stenopkylax micraulax, McLachlan, male. 



Fig. 1. Neuration of wings. 



2. Groove in costa of anterior wings, more enlarged. 



3. Apex of abdomen, from side. 



before its termination ; discoidal cell extending to near the base of tbe wing, its upper edge 

 nearly straight, the lower slightly curved ; all the apical cellules broad at the base, the 

 2nd very broad, truncate, 4th also truncate, 3rd bi-angulate. Posterior wings pale greyish 

 sub-hyaline, with sparse, minute blackish hairs on the membrane ; neuration pale ; discoidal 

 cell rather shorter than in the anterior ; 1st apical cellule much narrower than the 2nd to 

 4th, which are very broad ; upper branch of cubitus furcating about on a level with the 

 middle of the discoidal cell. 



In the male the anal parts are arranged as follows : The 8th dorsal segment is very large, 



testaceous, rather thickly clothed with long and 

 strong testaceous hairs springing from small 

 tubercles ; viewed from above its margin appears 

 to be straight, with several strong testaceous 

 spines in the middle placed closely together ; but 

 viewed in front (or from beneath) the median 

 portion is seen to be strongly turned under, 

 forming a triangle, closely set with black tuber- 

 cles. What appear to be superior appendages are 

 band-shaped, flattened, slightly curved, truncate 

 processes, little prominent, and inserted so far 

 inf eriorly as to cause a doubt as to their true 

 value. (It may be that they represent the inter- 

 mediate appendages, and that the superior are 

 only indicated by a tubercle projecting slightly beyond the margin above them). The 8th 

 ventral segment is rounded on the margin, and from it proceed two short, broad, excessively 

 liairy lobes, divided by a suture, and each excised on its margin, apparently belonging to the 

 9th ventral segment ; internally each of these lobes is very concave, and lying in them 'are 

 Avhat appear to be the very short obtuse inferior appendages. What appear to be the penis- 

 sheaths are sub-cylindrical processes, curved strongly inward in a forcipate manner and nearly 

 touching at the tips, which are somewhat thickened, blackish, and furnished with short spines. 

 The penis lies between them, and is strong and rather short. 



In the female the apex of the abdomen is very obtuse. The 8th dorsal segment broad (con- 

 cealing the 9th in the dry insect), its margin slightly rolled inwards, and fringed with yellow 

 hairs ; the 7th ventral segment forms a kind of pouch, the 8th with a concave space, 9th in 

 the form of a short open tube. 



Length of body 11 12 mm., ? 12 IB mm. Expanses 36 mm., ? 44 mm. ; greatest 

 breadth of anterior wings j 6| mm., $ 7 mm. 



Pending the discovery of some method for satisfactorily dividing Stenophylax, this insect 

 must be placed therein. It differs from any species known to me in the curious groove near 

 the base of the costal margin in the anterior wings of the male, and also in the anal parts, 

 which almost defy intelligible description. 



The external aspect is somewhat intermediate between the groups of which the European 

 S. stellatus and S. concentricus are representatives. 



PLATYPHYLAX, n. sp. 



Two females from the same locality as the last ; it is useless to describe them without 

 more examples in better condition, and of the other sex. 



