Tune, 19 1 2.] TOWNSEND : MUSCOID FlIES. 109 



massed against the posterior ventral plates. A dozen or so of these 

 eggs occur in each ovary, indicating as many ovarioles, the ova 

 developing successively. In one or two cases several eggs were 

 found in the uterus or uterovagina next ovipositor. The dissections 

 did not establish the presence or absence of incubating uterus, but 

 such is probably not present. The Phasiid resemblances lie partly in 

 the brownish color of the mature egg in the ovarioles, which is com- 

 monly seen in the Trichopodine flies. With the present exception no 

 Exoristine flies are yet known with other than white or pearly-whitish 

 eggs in the ovarioles, except possibly Cyclotophrys anser which 

 deposits golden eggs. The egg is proportionately more elongate than 

 that of Exorista and its allies, and may be described as narrowed 

 elongate-subovate to subelliptical, but the mature chorion appears 

 evenly bulged arc-like on the left side and more or less nearly straight 

 on right side. This does not seem due to position of egg in the mount, 

 the eggs all seeming to lie flat on their ventral surface. The micro- 

 pyle and anal alveolae are out of center in these eggs, indicating as do 

 the preceding characters that the convex surface is laterodorsal. The 

 chorion is without either operculum or reticulation. The egg is 

 shown in Fig. 29 of Contr. Th. Knowl. Muse. Flies. 



The fly resembles in size and general appearance a small speci- 

 men of Chcctolyga militaris Walsh (commonly determined by Coquil- 

 lett as Winthcniia quadnpiistiilata) , but the latter has much broader 

 and uncolored eggs. 



Type, TD663 (fly, two slides of eggs). 



Described from TD651, 663, 906, 1102, 1103, 1130, 1131, 1175, 

 1201, etc. 



The present species is the type of the genus and also of the tribe 

 Phasiopsini. 



Neothelaira dexina, new genus and new species. 



One female taken by Mr. F. B. Lowe near Swampscott, Mass., 

 Aug. 29, 1908. This fly has a Pseudodexiine habitus, but apparently 

 is to be classed in the Exoristin^e. Arista short and stout, third anten- 

 nal joint long and slender, face oblique, head golden pollinose ; abdo- 

 men elongate with long erect marginal and shorter discal bristles. 

 Facialia quite bare ; apical scutellar bristles weak and decussate, 

 erect; next scutellar pair very long. Facial plate showing a slightly 



