12 
MR. F. WALKER ON DIPTERA COLLECTED AT 
veins black, testaceous at the base; discal transverse vein straight, 
parted by a little more than half its length from the border, and by 
full twice its length from the prebrachial transverse. Length of the 
body 3 lines; of the wings 5 lines. 
Gen. Dryromyza. 
39. Dryomyza semicyanea, Walk. See Vol. III. p. 109. 
Gen. Scromyza, Fallén. 
40. Sciomyza? leucomelana, Walk. See Vol. IV. p. 144. 
Subfam. Lauxanipzs, Walk. 
Gen. Loncnu a, Fallén. 
41. Lonchza? consentanea, Walk. See Vol. 1V. p. 146. 
Subfam. Orratipes, Haliday. 
Gen. LamprocastErR, Macq. 
42. LAMPROGASTER SUPERNA, n. s. Fem. Testacea, capite supra 
nigro, oculis albo-marginatis, thoracis disco cyaneo, abdomine supra 
purpureo, alis cinereis basi et apud costam fulvis, striga transversa 
guttaque antica exteriore nigris, striga costali apicali nigricante. 
Female. Testaceous, shining; head black above, white about the eyes ; 
mouth large ; antennz short, 3rd joint not more than half the length 
of the face ; arista bare, pubescent at the base; scutellum and disk of 
the scutum blue; abdomen oval, purple above, a little shorter and 
broader than the thorax ; wings cimereous, tawny at the base and along 
the costa, a black streak extending from the costa along the prebrachial 
transverse to the prebrachial vein ; a black exterior dot on the radial 
vein, and a blackish streak at the tip of the costa; veins black, testa- 
ceous towards the base ; discal transverse vein straight, oblique, parted 
by hardly one-third of its length from the border, and by about its 
length from the prebrachial transverse. Length of the body 5 lines; 
of the wings 10 lines. 
Gen. Pratystoma, Latr. 
43. PLATYSTOMA POTENS,n.s. Mas et Fem. Cinerea, crassa, capite 
ochraceo, thorace vittis septem nigris, abdomine subtus testaceo, 
pedibus rufescentibus, tarsis nigris basi testaceis, tibiis anticis apice 
nigris, alis cinereis nigricante confertissime guttatis, halteribus tes- 
taceis. 
Male and Female. Cinereous, broad, thick ; head ochraceous, white 
about the eyes and behind; face with a slender piceous stripe ; an- 
tenne ochraceous; 3rd joint long, linear, about half the length of the 
