904 Charles Paul Alexander 



frequent open woodlands and shrubbery often remote from running water. 

 C. deUcatula is apparently a more local species than C. flavoferruginea, 

 being more frequently found in mountainous localities. 



It should be noted that C. indivisa is a synonym of C. flavoferruginea 

 0. S. The remarkable variation in the venation of this species has been 

 discussed by Alexander and Leonard (1912), 



Genus Rhabdomastix Skuse 



1889 Rhabdomastix Skuse. Proc. Linn. Soc. N. S. Wales, ser. 2, vol. 4, p. 829, pi. 22, 

 fig. 15. 



(Subgenus Sacandaga Alexander) 



1911 Sacandaga Alex. Ent. News, vol. 22, p. 349-351. 



Rhabdomastix is a small genus, including seven described species. 

 The group is close to Gonomyia, but the male hypopygium has a very 

 different structure and is of a distinctly primitive type. The subgenus 

 Rhabdomastix, sens, str., which occurs in Australia and South America, 

 has greatly elongated antennae in the male sex; the subgenus Sacandaga, 

 with four species and a race, has the antennae short in both sexes. 



A key to the local species of Rhabdomastix follows: 



Cross- vein r present tho weak; veins issuing from the small pentagonal cell 1st Mi sub- 

 parallel; basal deflection of Cui at the fork of M; body coloration grayish; arctic species. 

 {Goniomyia {Eiwpeda) caudata Lundb. Vidensk. Meddel. fra den naturh. Foren., p. 267, 

 pi. 6, fig. 18. 1898.] (Plate XXXVI, 96.) R. caudata (Lundb.) 



Cross-vein r lacking; veins issuing from the hexagonal cell 1st M2 arcuated; basal deflection 

 of Cui under the middle of cell 1st Mi; body coloration yellowish. [Sacandaga flava Alex. 

 Ent. News, vol. 22, p. 351-352, figs. 1-3. 1911.] (Plate XXXVI, 97.). . .R. flava (Alex.). 



Genus Qonomyia Meigen 



1818 Gonomijia Meig. Syst. Beschr., vol. 1, p. 146. 



1869 Goniomyia O. S. Mon. Dipt. N. Amer., part 4, p. 176. 



In the genus Gonomyia there are about seventy-five described species, 

 which are well distributed thruout the world, being found on all the conti- 

 nents and on many of the oceanic islands. The writer places the species 

 in four subgenera — Gonomyella Alex., Gonomijia IMeig., Ptilostena Bergr., 

 and Leiponeura Skuse, the second and the fourth occurring within the 

 limits considered in this paper. The coloration of many of the species 

 is often contrasted brown and yellow, the pleura of the thorax being 

 striped longitudinally. The immature stages of the species so far as 



