418 I\Ir. J. R. Mallocli on Exotic Mu.scaiida3. 



that appear to warrant its separation from Phaonia are tlie 

 almost bare arista, well-developed presutural acrostichals, 

 and the absence of long sensory Lairs on basal segment of 

 fore tarsns. 



I can see no reason to accept the genus as distinct, if we 

 do not also accept Euphemia, llobineau-Desvoidy, as such. 



The specimen of chalybea before me bears a written label 

 with the words " Coquimbo, Aristolochia ^^ and the numbers 

 82-102. 



Genus Pterocaxtiius, nov. 



Generic characters. — Belongs to the same group as 

 Trichopiicus, Rondani. Separable from it and allied genera 

 by the presence of some long fine hairs on lower surhiee of 

 first wing-vein at middle and on base of third vein above 

 and below, and by having the lower surface of scutellum 

 hairy — a character very rarely found in this subfamily. 



Genotype, Aricia simdeivalli, Zetterstedt. 



Spilaria chcetopygus^ sp. n. 



Female. — Similar to lucorum, Meigen, in colour. Antennae 

 and palpi black. Thorax quadrivittate. Abdomen witii a 

 slender dorso-central vitta and poorly defined lateral spots 

 black. Legs black. Wings clear, not conspicuously yellow 

 at bases, the cross-veins not int'uscated. 



Parafacials seen from in front much wider than third 

 antennal segment. Prealar very short ; postsutural dorso- 

 centrals 4 ; sternopleurals 2 : 2. Fourth tergite with 

 long but not dense bristles on disc. Fore tibia with a 

 median posterior bristle ; mid-tibia with three or four 

 posterior bristles; hind femur with moderately long bristles 

 on almost the entire length of antero- ventral surface, the 

 postero-ventral snrface almost bare. Outer cross-vein more 

 distinctly curved than in lucorum. 



Length 9 mm. 



Type and paratype, Troodos, Cyprus, July-October 1902, 

 about 4500 feet (Miss D. M. Bate). 



Differs from lucorum in having the fourth tergite much 

 more conspicuously bristled and the fore tibia with a median 

 posterior bristle. Like all species which 1 have placed in 

 the genus Spilaria, this or.e has a series of fine hairs on 

 hypo})leura below the spiracle and some hairs on sides of 

 scutellum which invade the ventral surface slightly. 



