236 



The puparium is of the shape usual in this genus : ellip- 

 tical, strongly convex, flattened beneath where it is attached 

 to a stone or other surface. The colour is dull yellowish- 

 brown, obscured by irregularly attached particles of earth ; 

 the anterior pupal respiratory horns and the posterior larval 

 ones are ferruginous ; posterior respiratory tubercle bifid at 

 tip. The dorsal surface is nearly smooth and shows none of 

 the usual reticulations, but instead is studded with scattered 

 prominent brown tubercles (somewhat obscured by the 

 attached particles of earth). Length, 7 mm. • width, 5'5 

 mm. ; height, about 3 mm. 



Microdon brachycems appears to be related to the Tas- 

 manian species described by Macquart as Aphritis vittatus 

 and A. pictipennis. The figure of the wing given by Mac- 

 quart for the latter species (Dipt. Exot., Suppl. 4, pi. xii., 

 fig. 12) agrees very well with the wing of our species; how- 

 ever, there are too many other differences (even allowing for 

 Macquart's notorious inaccuracies) to admit the identity of 

 the specimen before us with pictipennis. Furthermore, Mac- 

 quart himself had some doubt that the male he described 

 under pictipennis is correctly associated, and there is nothing 

 to indicate whether the figure of the wing was taken from 

 the female or male. In M. brachycerus the antennae are un- 

 usually short and stout. 



Limosina mrymecophila, n. sp 



9 • Shining black. Frons brown, shining, devoid of 

 hairs, only the strong bristles present ; these consist of two 

 upwardly divergent central rows of three each, which are 

 slightly incurved, of almost equal strength, and equidistant 

 serially ; a pair of closely-placed, nearly equal-sized bristles 

 at above the middle near to eye margin, one near lateral 

 posterior angle, one post-vertical on each side and one pair 

 on ocellar triangle ; antennas clear yellow, first joint as long 

 as third (the apparent second), first joint with several black 

 bristles on inner surface, third joint slightly pubescent ; 

 arista very long and thin, slightly pubescent; face yellow, 

 darker towards antennae, one very long and strong and 2-3 

 very small bristles on jowls : palpi small, yellow. Thorax 

 shining black, bare in front, the usual pubescent hairs in- 

 creasing in number and length towards posterior margin, two 

 distinct pairs of dorso-central bristles ; scutellum large and 

 broad, regularly rounded on posterior margin. Abdomen 

 highly polished, bare except on posterior margin of last two 

 and lateral margins of all segments ; third segment with 

 a raised transverse ridge at close to posterior margin. Legs 



