June, I9I2.] Townsend: MuscoiD Flies. 113 



Type, TD390 (fly and slide of eggs and maggots). 

 The type of tribe Euceromasiini as well as of genus. 



Otomasicera patella, new genus and new species. 



One female, Melrose Highlands, Mass., June 8, 1909, collected by 

 Mr. W. R. Thompson. Uterus contained many black microtype eggs. 

 The egg is limpet-like, being flattened on under surface and showing 

 dorsally a short-subconic profile, the dorsal portion with subcon- 

 tinuous irregular concentric veins or wrinkles apparently formed by 

 thickenings of the chorion. The chorion between the concentric veins 

 is net-like in structure in the peripheral region but denser and with 

 fewer punctures in the central region. There is no honeycomb reticu- 

 lation. The egg, chorion structure and cephalopharyngeal skeleton of 

 first-stage maggots are shown in Figs. 168 to 171 of Contr. Th. 

 Knowl. Muse. Flies. 



Type, TD2714 (fly and 2 slides of eggs with a few partly devel- 

 oped maggots). 



This is type of tribe Otomasiceratini as well as of genus. 



Cnephalomyia floridana, new genus and new species. 



Cncphalowyia floridana gen. et sp. nov., TD877 — Ann. E. S. Am., Vol. IV, 

 pp. 13^ and 144-5- 



Numerous specimens of both sexes taken on flowers of Eittliamia 

 a few miles north of Miami, Florida, and at White Springs, Fla., 

 during October and November, 1908. Allied to Cucphalodys on repro- 

 ductive and egg characters, and approaching Ciicplialia in general 

 habitus. The uterus is very long and tube-like, rather or quite slender, 

 in very many coils, and contains up to some five thousand microtype 

 eggs. Differs at once from Cncplialia not only in certain external 

 adult characters to be pointed out later, but also in the peculiar form 

 of the eggs in utero. Both white or undeveloped and black or matur- 

 ing eggs are elongate and appear with the low power of the binocular 

 to be quite sharply pointed at each end but more tapered at cephalic 

 end, reminding one of microscopic miniatures of certain grass-seeds. 

 ]Many females were dissected, and in all of them without exception 

 all the eggs, both white and black, were of this same form. In the 

 entire lot of material, however, not one egg containing a fully- 

 developed maggot could be found. The early embryos were numerous, 

 but none showed even the beginnings of the cephalopharyngeal skele- 



