697 



Supplement by R. C. L. Perkins 



to 



DIPTERA. 



Vide Tom. iii. hujus operis, pp. i — 92. 



Fam. PIPUNCULIDAE. 

 (i) Pipunctihis vulcanus, sp. nov. 



Head with the front and face black, with inconspicuous fuscous tomentum and in 

 the female smooth and shining for half the distance between the ocelli and antennae ; 

 posteriorly the head is greyish tomentose, at least towards the sides, but not densely so. 

 Antennae entirely dark, black or piceous, third joint acuminately produced at the apex. 

 Mesonotum somewhat shining, especially in the male, with hardly noticeable fuscous 

 tomentum, and further clothed with short and sparse, but very distinct, erect, black 

 hairs ; in the female the sides as far as the tegulae and the anterior margin with a 

 narrow border of whitish tomentum ; the pleura with sparse whitish tomentum in both 

 sexes ; scutellum with a marginal fringe of bristly hairs, which are more developed than 

 the mesonotal ones; metanotum with whitish tomentum. All the legs entirely dark 

 above, the femora being black or very dark brown, with short bristly black or spinose 

 hairs beneath, the middle ones with a very regular series of longer hairs, curved 

 downwards, on their posterior face ; tibiae often less dark than the femora, piceous 

 or reddish pitchy, and without special bristles on the hind pair ; tarsi black, or at least 

 dark, above. Wings strongly infumate or fuscous in the male, nearly clear in the 

 female, third costal segment much shorter than the fourth, posterior cross-vein obliquely 

 transverse, its upper extremity about opposite the apex of the second longitudinal, 

 terminal segment of fourth distinctly bisinuate ; stigma brown. Abdomen shining on 

 the apical segments of the male, very little tomentose except rather obscurely on the 

 apical part of the basal segment, which has the lateral series of bristles well developed, 

 the rest of the abdomen bearing short black hairs. In the female the abdomen is 

 greyish tomentose and clothed with short black hairs, dull, except the fifth segment. 

 Length 3'5 — 4 mm. 



Allied to P. jiivator, a variable and widely distributed species, which is found with 

 it, and also occurs on other of the islands. Superficially P. vidcmms is most readily 

 distinguished by the darker legs. 



Hab. Hawaii, Kilauea. 



