IQI3.] E. Brunetti : Diptera. 189 



spot more or less visible bj' a darker outline ; in occasional speci- 

 mens a large shining brownish triangle distinctly visible. Anten- 

 nae yellow. 3rd joint elongate, with a thickened black densely 

 pubescent arista twice as long as the joint, turned inwards 

 slightly but obviously. Back of head yellowish, often with an 

 irregularly shaped black spot in the middle. 



Thorax varying from yellowish to rather dark brown, the 

 usual three dorsal stripes present in some specimens but indis- 

 tinctly. Usually the stripes are not visible, in some cases the 

 spaces between them appear as two fine indistinct whitish lines. 

 In other examples the whole thorax, including sides and scutellum, 

 are dark brown, nearly blackish. The scutellum bears a few 

 weak stiff hairs about its tip. 



Abdomen varying from brownish yellow to dark mahogany 

 brown ; sometimes a little pale yellowish about the base, generally 

 with posterior margins of segments very narrowl}^ pale. Belly 

 usually similar to upperside. 



Legs wholly bright brownish yellow ; fore pair often a little 

 paler, front and hind tibiae often obscurely blackish, and some 

 of the tarsi often more or less darkened. Hind femora distinctly 

 but not greatly enlarged. 



Wings clear : 3rd longitudinal vein not parallel with 2nd or 

 4th ; anterior cross- vein just bej^ond tip of ist vein (in some speci- 

 mens barely so) ; posterior cross-vein distant from anterior cross- 

 vein by a little more than its own length, its position not being 

 quite stable. Halteres very pale j^ellowish. 



Described from 3 specimens from Dibrugarh, 17— 19-xi-ii; 

 also from a considerable series in the Indian Museum. Calcutta, 

 i3-iii-07 [A7inandale]; ly-v-oy; i7-vii-07; q-viii-07 ; Allahabad, 

 i5-viii-09 [Lord]; Manbhum Dist., Bengal, 13-X-09 [Jenkins]; 

 Monghyr, Bengal, 23-ix-09 [Jenkins]; Kulti, Bengal, ioviii-09 

 [Lord] ; Rajmahal, Bengal, 14-ii-io [Chaudhuri\ ; Mangaldai, 

 Assam-Bhutan Frontier, 30 — 3r-xii-io [Kemp]; Jahada, Nepal, 

 i4-ii-o8. 



Some uncertaint}' attaches to this species. The generic 

 characters agree perfectly with Becker's plate of Pachylophus, 

 and figure of the antennae (Ann. Mus. Hung, viii, pi. xiii, 5-6), 

 except that the hind femora in the present species is not spinose 

 below. Loew says in his generic description that the frons pro- 

 trudes forwards considerably in front of the eyes, and figures this 

 character very definitely, but it is not obvious in Becker's figure, 

 and it is certainly absent in my species. 



As regards the spinose underside of the hind femora, Loew 

 did not make it a generic character, nor is it necessarily one, and 

 it does not appear in the description of rufescens^ Meij. As the 

 present species agrees with remarkable precision with Becker's 

 description of rufescens, Meij., it is reasonable to assume the iden- 

 tity, especially as the present is a quite variable species and ap- 

 parently widely distributed. 



