34 



EDWARD NORTOX. 



UPPER WING. 

 (I. Stigma. 

 (). Costa or costal margin. 



c. Apical margin. 



d. Costal and post costal veins. 

 €. Externo medial. 

 /, g. Anal. 

 h. Posterior margin. 

 •/. Marginal vein. 

 j. Submarginal vein. 



/,-. First, second and tliird 

 (transverse) submarginal 

 nervures. 

 /. Recurrent nervures (discoi- 



dai.) 



VI. Discoidal vein. 

 n. First and second inner apical or submarginal nervures. 



Bullte or clear spots on the veins or nervures, with bullar or clear linos cross- 

 ing them. 

 1. 2. Marginal or radial cells. 

 3, 4, 5, 6. Submarginal or cubital cells. 

 7, 8, 9. Discoidal cells. 

 10. Costal cell. 



11,12. Brachial or medial cells. 



I-!, 14. Inner and outer apical cells. (Hinder cells, Harti.g. Cellule du limbe, 

 Lepel.) 

 No. 11 is sometimes the medial, and Nos. 12 and 13 the submedial cells. 

 Nos. 9 and 14 the apical cells; Nos. 7 and 13 discoidal; Nos. 10, 11, 12, 

 la, the 1st, 2d, 3d, and 4th brachial cells. 

 15. Lanceolate cell. — 1. Open. 



2. Contracted. 



3. PetioUite. 



4. Sub-contracted, 



5. With oblique cross nervure. 



6. With straight cross nervure. 



Thorax. — This is generally wi<L'r than the head. The prothorax 

 is its anterior part, its upper eJ^e or collar curving and joining wings; 

 the angular space nearest the wings is called the anterior angle, back 

 of which, next the pleura, is the first spiracle. The niesothorax is be- 

 tween the wings above, and is divided into three lobes, with deep su- 

 tures between. Properly connected with this, between this and the 

 Hietathorax is the scutelluiu, which is generally small, elevated and 

 rounded or conical. Behind this is the post-scutelluni, at the sides of 

 which are usually two minute white dots (cenchri). The nietathorax 

 is the hinder part of the thorax, and has attached to it the hinder pair 

 of wings and the two hinder legs. The posterior portion of the meta- 

 thorax is often divided by a suture from the anterior part, and covers 



