Mr. C. G. Lamb on Exotic Helomyzidce, cCc. 269 



veins well and broadly suffused ; veins brown. Halteres 

 orange. 



Legs : colour all orange, except that the hind knees and 

 all the last tarsal joints are brown, and the tibiae have tips 

 browned. Bristles : — front femur with usual upper row and 

 inferior hairs ; mid femur with anterior row of 3 on distal 

 third ; hind femur with 5 bristles, three form an anterior 

 superior row, the last of these and two others, one above the 

 other, form a triangle ; usual tibial preupicals. 



Abdomen orange, each segment with a black band based 

 on distal margin, narrow at side and broadening to middle, 

 with rather indistinct boundary there, so that the appearance 

 is like an indistinct mid-line with distinct side-teeth ; genital 

 segment orange, except extreme tip, which is black. 



iSize 7 mm. 



S. Rhodesia: Chirinda Forest (6r. A. K. Marshall, 

 Camb. Coll.). 



Helomyza aspinosa, sp. n. 



This large species is quite aberrant, inasmuch as the 

 characteristic costal spines are not to be seen ; they aie 

 apparently so short as to merge in the general costal bristle- 

 border, which is more strongly developed than usual. The 

 venation is quite normal, as is the complete cheetotaxy in 

 every respect. In broad facies the insect is not quite typical 

 of the genus, but looks rather like a Dryomyzid. The 

 absence of costal bristles is even more marked than is appa- 

 rently the case in the aberrant genus lliyreophorella, if one 

 may judge by the figure of the same. 



Head (top view) : — All dull orange, darkened a little in 

 front, black-haired, especially in front ; the usual short hind 

 eye-borders and conjoined ocellar triangle are somewhat 

 paler, as is the hind head; the neck-spot is more orange and 

 a little silvery. Face orange, a little darker over lip. Side- 

 view : — All orange, including theantennal third joint (which 

 is, however, brown on its absolute edge), arista (with very 

 long hairs), the hairy palpi, and the tongue; a long vibrissa, 

 with a few short neighbours below. 



Thorax : dorsum dull reddish brown, a little darker in 

 front and lighter on side from d, c. lines to pleura ; two 

 indistinct blackened lines run along the d. c. rows, with a 

 similar indistinct line outside from about the level of cross- 

 suture. Scutellum similar on the disc, which is quite fiat 

 and bare, with a few tiny hairs between the main bristles 

 along the edge. Pleura (including callus and notopleura) 



