302 Mr. E. E. Austen on Mudca marginulis 



Chrysomya, Kob.-Desv., is a hybrid genus and is also 

 insufficiently cliaracterized. 



Soviowyia, Ilond., appears never to liave been described. 

 The reference given above is apparently that alluded to by 

 Kondani himself, Dipt. Ital. Prodr. vol. iv. (18G1) p. 9; 

 but on turning to tlie work in question we find that the 

 genus Somomyia is merel}' alluded to in an extract from a 

 letter from Kondani to Prof. Giuseppe Bertolini, which is 

 quoted by the latter in a note to a paper on the Diptera of 

 J\lozambique : there is nothing whatever in the shape of a 

 description. 



The following is the synonymy of Pycnosoma mai'ginule, 

 Wied. : — 



Pycnosoma mnrginale, Wied. 



Musca maryinalis, Wiederaann. Auss. Zw. Ins. (IS'IO) p. "05. 



? Cosmina arabica, Robineaii-Desvoidy, Essai sur les Myodaires (1830), 

 p. 424. 



Chiysomya reyaUs, IJohineau-Desvoidy, ihid. p. 440. 



Somomyia Jitcnyinalis, Bertolini, Mem. dell. Accad. dell. Scienze dell' 

 Istiluto di Bologna, t. xii. (18G1) p. 44. 



raracoitipjiumyia niyripennis, Hough, Proc. Acad. Nat. Sci. Phila- 

 delphia, 1898, pp." 184-186 : figs, of details in text. 



Pycnosoma muiqino.h, Au>ten, Journal of the Royal Army Medical 

 Corps, June 1904, pp. 13-14, pi. ii. fig. 4. 



Paracomjjsomyia iiif/ripennis, Adau's, Kansas University Science 

 Bulletin, vol. iii. no. 6 (Oct. I'JOo), p. 201. 



Pycnosoma marginale is very widely di^stributed in Africa, 

 and even ranges eastward as far as Quetta ; westward the 

 writer has met with it in St. Vincent, Cape Verde Islands. 

 The British Museum collection includes specimens from the 

 following localities: — Sierra Leone; Congo Free State; 

 Cape Colony; Natal; Transvaal; N.E.Rhodesia; Uganda; 

 Abyssinia ; Sokotra ; J\Iuscat, Arabia ; and Quetta. Dr. A. 

 Donaldson Smith took it in Somaliland on Aug. 23^ 1894 *, 

 and Colonel Yerbury found it at Aden. 



As pointed out by Bezzi (Bull. Soc. Ent. Ital. xxxiii. 

 (1901) p. 23), Musca chloro'pyga^ Wied., and Somomyia cupri- 

 nitens, Bond., also belong to Pycnosoma. P. cuprinitens was 

 described from Keren, Abyssinia. The synonymy of Pycno- 

 soma cidoropyga, Wied., is as follows : — 



Pycnosoma chhropyga, Wied. 

 Musca chhrojnfga, Wiedemann, Auss. Zw. Ins. ii. (1830) p. 400. 



* Elough, loc. cit. p. 184, 



