AUSTRO-MALAYAN DIPTERA 15 



black, which color has, in the middle of the back , a triangular 

 expansion , reaching the middle of the segment ; third segment 

 similar to the second, only the black hind margin is much 

 broader laterally; fourth segment grayish-pollinose at the base, 

 the tail black. Legs black; femora, in some places, grayish hoary. 

 Tegulae yellowish. Wings with a light brownish tinge, slightly 

 yellowish on the proximal half of the anterior margin. Length 

 about 11 mm. (exclusive of the tail). 



Hah. Kandari, Celebes; April 1874 (0. Beccari). A single 

 specimen, apparently a male. 



NB. In using the above description, especially in what re- 

 gards the arrangement of the bristles, it must be borne in mind, 

 that it was drawn from a single specimen. I have another spe- 

 cimen before me (Ternate, Beccari 1875), bat 1 am not sure 

 whether it is the same species. The facial and frontal orbits, as 

 well as the upper part of the thorax are more gray than 

 golden-yellow; there is very little yellow on the abdomen and 

 the wings are purer hyahne ; the frontal triangle is much shor- 

 ter. The arrangement of the bristles seems to be the same^ as 

 far as the indifferent preservation permits to discern it. The 

 specimen is a little smaller than the other (8 mm. to the be- 

 ginning of the tail). 



II. Note on the Diptera with an Achias-like development of the head 



(Laglaisia, Anaeropsis, Zygothrica). 



In my Enumeration of the Diptera of the Malay Archipe- 

 lago etc. (Ann. Mus. Civ. Gen. XVI, p. 476) I have published 

 a notice on the known species of Achias. I can complete it now 

 with a notice on the two Achias-like genera : Laglaisia and 

 Anaeropsis, which, thanks to M.'" Bigot's kindness, I have been 

 able to study in his collection. 



Laglaisia caloptera Bigot, Ann. Soc. Ent. Fr. 1880,92 (New 

 Guinea male), has the oculiferous peduncles enormously long, 

 both together often being as long as the whole body, but much 



