160 THE CANADIAN ENTOMOLOGIST, 



Austrophryno, new genus. 



Genotype, Tachina densa Walker, 1856, Dipt. Saund., 288-9, 

 New South Wales. Austen. Ann. Mag. N. H. ser. 7, XIX, 331 

 (Syn. Tachina Jiebes Wlk., I.e. 289, male, Tasmania). 



Allied to Phryno. Facialia ciliate on lower one-third. Cheeks 

 one-third eye-height. Antenna' inserted above eye-middle. I'ace 

 broad. Frontal bristles descending to base of arista, with some 

 small bristles below. Abdominal macrochaeta? onK- marginal. 

 Epistoma only slightly prominent. Eyes hairy. Frontalia narrow. 

 Antenna" about as long as face; the third joint slender in female 

 and less than three times the second, in male aliout three times 

 second. Arista much longer than third antennal joint, thickened 

 "at base. Cubitus hardh' obtuse, apical cross-\ein sHghth' l)ent in 

 at base, hind cross-vein more or less bent inward. 



Tracheomyia, new genus. 



Cicnotype, Oestrus macropi Froggatt, 1913, Agric. Gazette 

 X. S. W., July 2, 1913, pp. 567-8, pi. (5 figs.), Moramana Station, 

 \\'algett District, Australia. Maggot lives in the windpipe of the 

 kangaroo. Fly unknown. 



This appears to be an endemic Australian ocstrid, and is the 

 first one known. Its existence is thus of the greatest interest from 

 the biogeographical point of ^•iew, as well as with relation to the 

 phylogeny of muscoid stocks. The particular combination of 

 larval characters is unique, as may be seen from the description 

 and figures. The larval habitat ip the host is likewise unique. 

 The host itself is distinctiveh' Australian. . All these facts argue 

 for the marked distinctness of the fly. The small boss of the anal 

 stigmatic plates described by Froggatt would seem to be the 

 false stigmatic opening or so-called button, and can hardly contain 

 the spiracles which should lie outside the button in the field of 

 the plates. It appears that the anal stigmata much resemble 

 those of CEstrus ovis, but the armature is very distinct and ap- 

 proaches that of certain tachinids. Evidently this maggot does 

 not belong to any of the described genera of Australian flies. 

 It may be allied to Pharyngomyia or PharyngoboJus, judging from 

 larval habit, but on larval characters it is nearer to CEstrus than 

 to either of the genera named. 



