14 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 56 



bm 



I \ \ 

 I Ibp \ 



lllap^ 



II bp 



"bm lap II a p 



Fig. 2. Scheme of the wing. 



Longitudinal folds (longitudinal veins) : 

 gi, Anterior margin, marginal vein. 



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

 Iha, First raised (convex) fold of the anterior region, subcostal vein. 

 llaa, Second depressed (concave) fold of the anterior region, radial vein. 

 llha, Second raised (convex) fold of the anterior region. 

 lllaa, Third depressed (concave) fold of the anterior region. 

 lllha, Third raised (convex) fold of the anterior region, ulnar vein. 

 IVaa, Fourth depressed (concave) fold of the anterior region. 

 IVha, Fourth raised (convex) fold of the anterior region, spuria. 

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

 Ihm, First raised (convex) fold of the middle region. 



Ham, Second depressed (concave) fold of the middle region, division vein. 

 llhm, Second raised (convex) fold of the middle region, submedian vein. 

 lllam, Third depressed (concave) fold of the middle region. 

 lllbm, Third raised (convex) fold of the middle region. 

 lap. First depressed (concave) fold of the posterior region, anonyma. 

 Ibp, First raised (convex) fold of the posterior region. 

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

 llbp. Second raised (convex) fold of the posterior region, axillary vein. 

 lllap. Third depressed (concave) fold of the posterior region. 



Other parts : 

 ag, Transverse anal vein. 

 at, Anterior transverse vein. 

 di, Discoidal transverse vein. 

 fk. Knee of the wing. 

 lo, Lobulus. 



po. Posterior transverse vein. 

 q, Median transverse vein. 

 Qi, Medio-marginal transverse vein. 

 re, Remigium. 



si, Notch of the marginal vein in the flexible zone. 

 sg, Squamula. 



