2C6 



Mr. E. E. Austen on new 



seen in profile, look like a fleshy pad lying on the under side 

 of the bulb just beyond the middle ; when the proboscis is in 

 use the fleshy portion is extended until it lies more or les3 

 in a line with the bulb, and the "tubular extension" (which, 

 in a fly of normal size, is approximately 0*5 mm. in length) 

 is protruded from between the inner surfaces of the labella, 

 of which surfaces it forms a prolongation ; the extension is 

 supported internally by a pair of stout, black, chitinous rods, 

 which are visible through tlie scmitransparent wall, and have 

 their proximal extremities situate between the tips of the 



Pkil(Ematomyia insignis, sp. n. 



Fig. I. — Head of 5 in piofile, showing proboscis as it appears when not 

 in use (X 25). 



labella ; the wall of the extension shows numerous parallel 

 trachea? ; in dried specimens, at any rate, the distal extre- 

 mity of the extension appears to consist of a thickened fleshy 

 ring, armed with pale yellowish teeth in addition to the 

 circlet of stout, black, pointed, chitinous teeth, which are 

 situate on its inner margin. 



Thoracic bristles: — Humeral^ 3 (in ^ sometimes 4). 

 Post-humeral, 1. Notopleural, 2. PrcEsutural, 1. Supra- 

 alar, 2. Intra-alar, 1. Post -alar, 3. Dor so-central, 4 or 5 

 (the large and conspicuous bristles alone included — 2 or 3 in 



