122 Memoirs of the Indian Museum. [Vol. Ill, 



ist pair with a row of bristles below ; a single spur on the middle tibiae ; bristles of the 

 hind tibiae rather long. 



Wings elongate, hyaline with brown cross-bands, which are partially united 

 together. No costal bristle ; all the veins straight ; the first not elongate ; the third 

 wholly bare or with very few bristles at the base ; small cross- vein before or on the 

 middle of the discal cell ; ' posterior cross- vein long, perpendicular ; anal cell drawn 

 out into a short and broad point, which is shorter than the second basal cell. 



Type : Musca crux, Fabricius, 1794. 



The present genus seems to have also an isolated position, on account of its 

 reduced chaetotaxy, strongly developed male genitalia and wing-pattern. In the 

 elongated and narrow body of Cordylura or Psila-\\k& shape, it shows affinity with 

 the European genus Euphranta, lyoew ; but in this genus the chaetotaxy is even more 

 reduced, the dc. also being absent as in Ptilona. The third vein in Euphranta has 

 some bristles at the base only ; in the present genus, the first two species have an 

 entirely bare third vein ; the third species (nigripeda) shows some bristles at the base 

 and one or two also after the small cross- vein ; but these are present in one wing only, 

 and therefore it seems to be subject to variation or caduceus. 



The species in the collection can be distinguished as follows : — 



1 (4). Predominant colouring greyish yellow; legs entirely pale yellow ; or. i. 2 ; 



bands of the wings partly united. 



2 (3). Wing-pattern paler and- variegated, with a cross-sliaped double band at 



the tip . . . . . . . . . . . . . . . . crux, Fabr. 



3 (2). Wing-pattern darker and not variegated, the apical cross being broken 



in two separate bands . . . . . . . . . . . . dissoluta, n. sp. 



4 (I). Predominant colouring black ; legs almost entirely black; or. 1.3; wing 



bands isolated, those of the middle divided into two streaks . . . . nigripeda, n. sp. 



30. Staurella crux, Fabricius. 



(PI. ix, fig. 33.) 



Fabricius, Entom. Syst., iv, 358, 190 [Musca] (1794) and Syst. Antl., 277, 23 [Dacus] (1805); 

 Wiedemann, Auss. Zweif]., ii, 488, ig [Trypeta] (1830). 



A narrow elongate, middle-sized, greyish species, very distinct by reason of the 

 variegated cross band at the tip of the wings. 



Head greyish yellow, occiput, vertex and face shining ; frons opaque, with few 

 dark hairs in the middle ; ocellar black dot very small ; a small black streak on each 

 side below the vibrissal edges ; the bristles are black ; the 2 lower or. are long and of 

 equal size ; the single superior or. is not inserted upon a tubercle as is the case in 

 Ptilona ; occiput with long pale hairs below ; palpi with some black bristles ; arista 

 with longer hairs on the upper side. 



All the bristles of the thorax are black, the sc. also ; dorsum with short yellow 

 pubescence, which is longer on the pleura ; pleura shining, darkened, reddish brown ; 

 the dorsum opaque, whitish-tomentose ; metanotum dark reddish brown, very shin- 

 ing in the middle. Scutellum light yellow. Squamulae whitish ; haltères yellow. 



