Pomona Com.eoe JouRN.Ui of Entomology 831 



"1. The pleura; in A. amrricnun are unicolorous ochreous; in A. senilis they 

 are roddish-hrown above Hnd below, more oehreous in the middle. 



2. The marginal cross-vein is present in A. americana, absent in ^1. senilis. 



3. The genitalia are different in the two species but as we have only one 



male, I do not want to disseet it, witiioiit wiiieli [ eannot iiro])erly make 

 out the structure." 



Adelphomyia cayuga sp. n. 



Large species (length, ?, T) mm.); radial cross-vein indistinct; cell Ml 

 absent. 



9 , length 5 mm. ; wing 5.1 mm. 



Rostrum, palpi and autennse light brown. Front, vertex and occiput 

 brown. 



Thoracic pra'scutum uniform light brown without apparent dorsal stripes; 

 scutum, seutellum and ])ostnatuiii lighter-colored yellow. Pleura' light 

 brownish-yellow, brighter colored on the metapleuriE and on the posterior 

 portions of the mesopleura'. Legs rather uniform light brown throughout. 

 Wings rather uniformly suffused with dark, meuibrane distinctly darker 

 colored than in americana or minuta ; veins light brown. Venation (Figure 260, 

 B) — Sel rather long, about five times as long as Se2; R2-|-3 in a line with R2; 

 cross-vein r not evident; basal defiection of R-t+5 in a line with cross-vein 

 r-m; cell Ml absent, i. e., Ml and M2 fused to the wing-margin. A short 

 pubescence in the apical portions of the wing, tips of cells Rl, R2, R3, R5, M2 

 and M3 being included. 



Abdominal tergum and sternum uniformly brown. 



Ilolotype 2 (balsam slide), Vanishing Brook, Ithaca, N. Y. : Aug. 16, 

 1012. (Alexander, coll.) 



Type in author's collection. 



