242 MICROSTYLUM OBERTHÜRII. 



clothed with orauge-yellow hairs. The two basal joints of 

 the antennae shining black , about equal in length ; third 

 joint dull greyish-black , slightly longer than the two basal 

 joints together. Proboscis longer than the head, shining 

 black, with some short rufous hairs at the tip; palpi black, 

 with black bristles. Thoracic dorsum somewhat flattened , 

 uniform dull dark-grey, with minute black hairs ; pleurae 

 and breast piceous, thickly clothed with black hairs; scutel- 

 lura small, brownish- black , with a few black hairs at the 

 hind border. Abdomen twice as long as the thorax, tapering 

 towards the end; the first four segments velvet-black, the 

 following shining-black; sides of the abdomen with long 

 black hairs ; the apical segments with some rufous pilosity; 

 anus with a double row of black spines. Legs robust, 

 black and black-haired ; pulvilli yellowish. Halteres brown- 

 ish. Wings longer than the abdomen, brown with a 

 bright-green , blue and purple lustre , and the normal ve- 

 nation of the genus Microstylum. 



A female specimen from Siao-Lou , at the frontiers 

 between Thibet and China, in the province Tatsien-Lou. 



This species is closely allied to Dasypogon {Microsty- 

 lum) Vica Walk. (List Dipt. Brit. Mus. II, p. 304), 

 of which I saw a specimen preserved in the Museum at 

 Budapest, and to which may be reckoned as synonymous 

 Microstylum spinitarse Macq. (Dipt. exot. Suppl. 4, p. 61, 

 pi. 6 , fig. 1). M. Vica is likewise a black species with 

 dark-coloured and iridescent wings, but it is of a much 

 smaller size (31 mm. length), and difi'ers by having the 

 thorax, instead of greyish, as black as the rest, and by 

 the black (not orange) hairs at the underside of the head. 



The Hague, February 1897. 



Notes from the Leyclen Museum, Vol. XV'III. 



