180 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



3. Larger species, 2-3 mm. ; scutellum with setulse in addition to the 4 



marginal bristles flava 



Smaller species, 1.5-1.75 mm.; scutellum with only the 4 marginal 

 bristles minima 



4. Last joint of mid tarsi of male black; of the female slightly brownish 



nigrimana 

 Last joint of mid tarsi yellow concolor 



Chyromya femorella Fallen. 



Sapromyza femorella Fallen, Dipt. Suec., Ortalid. .34, 15 (1820). 



This species like all the others in the foregoing table except 

 nigrimana is yellow in color with a black ocellar spot. The 

 mesonotum has four pairs of strong dorso-central bristles and 

 about six irregular rows of setulse between them. The femora 

 of the female are less distinctly thickened than those of the male 

 but still appreciably thicker than those of flava. 



I have seen both sexes of this species from Algonquin, 111., 

 W. A. Nason. Male swept from low herbage along creek; most 

 of the females taken on windows, but a few on flowers. May to 

 June. 



Chyromya flava. Linne. 



Musca flava, Linne, Fauna Suec. 1869 (1761). 



Scyphella flavicornis R-D., Essai Myod., p. 650, sp. 1 (1830). 



I have not as present before me specimens of this species, but 

 believe that Professor Melander has correctly recorded it as occur- 

 ring in America. 



I have taken the species commonly in Scotland on windows 

 where it occurred along with lutea. The latter is distinguished 

 from flava by the black third antennal joint and very probably 

 occurs in America also. 



Chyromya minima Becker. 



Peletophila minima Becker, Zeitschr. fur. Syst. Hymen, u. Dept., vol. 4, 

 p. 133 (1904). 



Becker describes this species as follows: "Matt, blassgelb. Thorax 

 mit 4 deutlichen Dorso-centralborsten und dazwischen unregelmassig in 

 ca. 1 Reichen gestellte Akrosti-kalborsten. Schildchen ausser den 4 Rand- 

 borsten nackt. Borsten und Haare auf dem Thorax und Kopf gelb. Augen 

 querliegend. Punctaugenhocker nicht geschwarzt. Hinterriicken und 

 Hinterlieb gelb; bei den Manichen ist derselbe, namentlich gegen das 

 Endehin deutlich, bei den Weibchen weniger deutlich, fein schwarz be- 

 haart. Schenkel nicht verdickt. Flugel wie bei den librigen Arten. 1- 

 lf mm. lang." 



Professor Melander records' this species from Washington and Cali- 

 fornia. 1 



1 Jour. N. Y. Ent. Soc., vol. 21, p. 300 (1913). 



