E. T. CRESSON, JR. 81 



HEDRONEURA Heiidcl 

 1902. Hendel, Wien. Ent. Zeit., xxi, 2G5. 



In general build, similar to Euthycera, but more slender. Scutel- 

 lum flat; meso- and pteropleura setulose; arista white putrescent 

 apically, basally black and thickened. No presutural nor pre- 

 scutellar bristles, but one or two dorso-centrals. Wings hyaline 

 or tinged, with few spots at the junctures of cross-veins, and 

 some clouding between the veins; no reticulations; posterior 

 cross-vein angularly bent, so that its juncture with fourth vein 

 is much beyond that with the fifth. The known species may be 

 readily distinguished by this character. 



The genus belongs to a group in which the wings are not reticu- 

 lated, and the hind cross- vein is biangulate. There are probably 

 other and better characters for the group, but the genera now 

 included are not well understood, and for the present paper the 

 above will serve well enough. In the group may be included the 

 European species, Musca {Elgiua) albiseia Scopoli, Tetanocera 

 (Elgiva) lineata Fallen, Musca {Hedroneura) cucularia Linne and 

 Musca {Hedroneura) rufa Panzer. Of the genera represented 

 Hedroneura is characterized by the absence of presutural and 

 prescutellar bristles. 



The genus was proposed for the species related to cucularia, 

 so we may consider Musca cucularia Linne (1758) the genotype. 



Hedroneura lineata Day (Pi. I, fig. 2; pi. Ill, fig. 37.) 



1881. Tetanocera lineala Day, Can. Ent., xiii, 88. 

 1914. Hidroneura lineata Malloch, Can. Ent., xlvi, 824. 



Regarding the proposed synonymy of Musca rufa, I prefer to 

 use Day's name until a thorough comparison with the European 

 species is made. I have seen a specimen which was determined as 

 rufa, luit even then could not satisfy myself of the synonymy. 

 Day's description does not leave any doubt as the species he had 

 before him. It is easily recognized by the characters given 

 below. 



(f, 9. Tawny to rufous; opaque, more or less yellowish gray species. 

 Antennal orbital spot black; four me.sonotal vittae and disk of scutellum, 

 brown. Abdomen blackish medially; all femora with infuscated spot below- 

 near apices; tarsi black apically. Cross-veins, especially at junctures, also 

 spot at end of second vein and streaks between second, thirtl, fomth, and 

 fifth veins, darker. Length. — 6 mm. 



TRANS. .-UI. ENT. SOC, XLVI. 



