NO. 12 



FLYING APPARATUS OF BLOW-FLY RITTER 



55 



PLATE 8 (Continued) 



Fig. 24. Stereoscopic view of the right wing-joint from above. (Magnified 

 20 diameters. Photographed with Zeiss binocular; Objective a2, Ocular 3.) 



p t A p t B 



gi, Marginal vein. 



ie, Vein of the inner margin of the lobulus. 



lo, Lobulus. 



pti, Processus pteralis alse i. 



pf2. Processus pteralis aljE 2. 



pt4, Processus pteralis alae 4. 



ptI, Processus pteralis thoracis L 



ptil, Processus pteralis thoracis H. 



ptVI, Processus pteralis thoracis VL 



ptA, Pterale A. 



piB, Pterale B. 



re, Remigium. 



sq, Squamula. 



Sq, Squama. 



t, Tegula. 



Vi, Stay. 



laa, First depressed (concave) fold of the anterior region, auxiliary vein. 



Iba, Crest of first raised (convex) fold of the anterior region. 



lam, First depressed (concave) fold of the middle region, discoidal vein. 



Ilbm, Crest of second raised (convex) fold of the middle region. 



I lap, Second depressed (concave) fold of the posterior region, anal vein. 



