122 MR. R. m'lachlan on new forms, etc., 



arise tufts of long hairs : ocelli absent : antennoe very long and 

 slender, but sometimes gradually thickening to the apex ; basal joint 

 short, succeeding joints (after the second) long, but those of the apex 

 becoming gradually shorter and almost transverse : maxillary palpi 

 ascending, the joints band-shaped and very hairy; first joint short, 

 third very long, second, fourth, and fifth each shorter than the third, 

 but the second longer than the fourth or fifth : labial palpi very 

 small and slender, the two end joints elongate. Mesothorax very 

 robust, long-oval, nude, but with a tubercle near the point of con- 

 nexion of each anterior wing, whence arise long hairs similar to those 

 on the vertex. Abdomen short, very robust in the $ . Legs slender, 

 pilose; spurs 2,4,4, the pairs subequal. 

 Wings nearly nude and shining, the veins very conspicuous and strong, 

 alike in both sexes. Anterior wings elongate, dilated towards the 

 apex, which is considerably produced ; apical margin very oblique ; 

 inner margin concave ; radius becoming confluent with the first 

 apical sector a little before the apex, but sending a short branch to 

 the costal margin ; discoidal cell closed, short, elongately triangular, 

 no veinlet between this cell and the radius; cellula mediana longer 

 than the discoidal, equal to it at its extremity, but extending further 

 inwards at its base ; cellula thyridii very broad, commencing near the 

 base, but not extending to the middle of the wing (ending before the 

 commencement of the discoidal cell), hence the sixth to ninth apical 

 cells extend far into the wing ; all the apical cells narrow and very 

 long. Posterior wings elongately oval, much shorter than the ante- 

 rior wings, and scarcely broader : radius confluent with the first 

 sector, as in the anterior, and the subcosta also appears to be con- 

 fluent with the radius at its apex ; the cubitus is furnished with a 

 fringe of long hairs towards the base, and the veins of the anal angle 

 are similarly fringed. 



The appendices of the male are complicated : the app. sup. 

 rather long, narrow at the base, but gradually dilating into a 

 spoon-shaped club ; the app. inf. two-jointed, the apical joint 

 being short and ovate ; between the app. sup. are two large 

 blades, nearly uniting in the middle, but with the obtuse points 

 divergent ; and between and below these there is the penis, only 

 the apex of which is visible. In the female the extremity of the 

 abdomen is broad, forming a large open pouch with two broad side 

 valves and a median prolongation of the last dorsal segment ; 

 the apical ventral segments are narrow and transverse. 



The figures on PI. III. (fig. 9) are taken from A. jinitimus } 

 M'Lachlan. The original species, A. humeralis, Walker, is larger 

 and darker, and, with the appendices somewhat different, though 



