618 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 49. 



below the foveae, forming a large subrectangular area whose edges 

 are even with the parafacialia and cheeks. The nearly obsolete 

 facialia are marked by sutures. 



Family MUSCIDAE. 



MICROCALLIPHORA, new genus. 



Genotype. — Lucilia vwripes Macquart, Dipt. Exot. Suppl., vol. 4 

 (2), 1851, p. 222, fig. 4, pi. 23. 



A very small Austrahan form which may be distinguished from 

 Musca, Lucilia, and related genera by the following characters: 

 Vibrissae inserted on oral margin, othei-wise much like CJirysomya. 

 Parafacials pubescent. Arista practically bare on lower side. Ejii- 

 stoma not so prominent as in Musca. 



Family RUTILIIDAE. 



EUAMPHIBOLIA, new genus. 



Genotype. — Rutilia fulvipes Guerin-Meneville, Revue Zool., vol. 6, 

 1843, p. 273. 



Differs from Ampliiholia as follows: Macrochaetae of abdomen 

 heavy spinelike. Anal segment emarginate in both sexes, buttocks- 

 like. Spines on venter, pectus, and coxae. Transvei-se marginal 

 row of mesoscutal spines in front of scutellum; latter pectmate with 

 equal long marginal bristles, none of them decussate. About 10 

 closely-placed median marginal macrochaetae on second abdominal 

 segment, the inner ones shortened; similar patch on third segment, 

 marginal ones on each side making a subcontinuous row slightly 

 marked off from the median patch; anal segment with a median 

 bunch of six on disk, buttocks with bunches of heavy short ones, the 

 segment with long hairs posteriorly and shorter tliick pile anteriorly. 



The genus may be distinguished at once from Formosia by the bare 

 arista. 



Family MILTOGRAMMIDAE. 



MICROSENOTAINIA, new genus. 



Genotype. — Senotainia nana Coquillett, Rev. Tach., 1897, p. 81. 



Differs from Senotainia as follows: Abdomen of male subcyhndrical, 

 arched apically, hypopygial hook elongate. Male abdomen practically 

 without macrochaetae, only some vestigial ones showing on very close 

 examination. Front of male strongly flattened, the parafrontals 

 closely approximated over frontaUa. The edges of the narrow fron- 

 talia are indicated by the frontal bristle rows. Claws of male elon- 

 gate, rather longer than last tarsal joint. 



For purposes of comparison it may be stated that in Senotainia the 

 parafrontals are closely approximated in female, not so in male; 



