Trans. Am. Ent. Soc, Vol. XXXIV. 



PI. III. 



EXPLANATION. 



dc, dorsocentral bristles, four in a row. 



h, humerus, with one bristle. 



s, tiie widened lateral end of the transverse suture, which is obsolete iu the 



middle of the dorsum ; the two notopleural bristles are located so that 



the s is between them, 

 ps, the presutural bristles, 

 sa, the three supra-alar bristles. 



sc, the scntellum with the two scutellar bristles, apical and lateral, 

 mes, mesoternum, with one mesosternal bristle at the posterior edge, 

 stern, sternopleura, with one bristle at the upper edge, 

 pp, propleura, with one bristle on the lower part, 

 ptp, pteropleura. 

 mtn, metasteriiuni. 

 hypo, hyposternuiu. 

 met, metanotum. 

 cxl, cx2, cx3, coxfe. 

 fl, f2, f3, femora. 



The shaded area is the insertion of the wing. 



ALDRICH AND DARLINGTON ON DIPTERA. 



