70 
Psyche 
[April 
areas of the epimeron em2 and meron me 2 in repose, and the 
subcostal ridge may have been developed in connection with 
holding the wing in place when at rest. When the hind wings 
are folded back in repose, the sclerite x of Fig. 4, projects into a 
pocket between the structures labelled ptg 3 and d in Fig. 4, and 
the costal edge of the hind wing lies above the process m of the 
epimeron em 3. Much of the anterior region of the wing lies on 
top of the area labelled w in Fig. 3, and this area was apparently 
developed in connection with holding the wing up in repose. 
A more detailed description of the folding of the wings, the 
basal structures of the wings, the areas of the wings, the inter- 
pretation of the veins (indicated in Fig. 16), and the mechanism 
of flight, etc., will be given in a paper dealing with the thoracic 
appendages of the roach, and need not be further discussed here. 
Literature Cited 
Berlesi 
1909. Gli Insetti. 
Crampton 
1909-1926. Thorax of Insects, Proc. Acad. Nat. Sciences, 1909, 
p. 3; Same Subject, Ent. News, 1914, 25, p. 15; Typical 
Segment, Zool. Anzeiger, 1914, XLIV, p. 56; Legs of 
Insects, Zool. Jahrb., 1915, 39, p. 1; Nature of Cervical 
Sclerites, Annals Ent. Soc. America, 1917, 10, p. 187; 
Terga and Wing Bases of Orthopteroids, Psyche, 1918, 
25, p. 4; Thoracic Sclerites of Immature Insects, Proc. 
Ent. Soc. Washington, 1918, p. 39; Parts of an Insect's 
Leg, Can. Ent., 1923, LV, p. 126; Head and Abdomen of 
Roach, Psyche, 1925, XXXII, p. 195; Neck and Prothorax 
of Insects, Trans. Amer. Ent. Soc., 1926, LII, p. 199, etc. 
Miall and Denny 
1886. The Structure and Life History of the Cockroach. 
Snodgrass 
1908. A Comparative Study of the Thorax in Orthoptera, etc. 
Proc. Ent. Soc. Washington, IX. 
1909. The Thorax of Insects, Proc. U. S. Nat. Museum, XXXVI, 
p. 511. 
1909. The Thoracic Tergum of Insects, Ent. News, XX, p. 97. 
