WINGS 



23 



behind by the narrow dorsal arch of the iiietathorax and the fii-st 

 abdominal segment, its apex comes in contact with the base of the 

 haltere. The dorsal region of the metathorax has practically 

 disappeared, all that can be recognised as metanotum is a nai-row 

 chitinous strip (um.) on each side between the apex of the nieta- 

 pleiiral area and the dorsal edge of the first abdominal area. 



The Wings. 



The wings are situated at the sides of the scutum on tin- alar 

 membrane, to which are attached the sclerites of the wing-base. 

 They are covered with very fine hairs. 



In describing the neuration of the wings the nomenclature 

 proposed by Comstoek and Needham (1898) for the wings of the 

 whole group of insects will be employed. 



ClL ^ 

 CLS. 



Mj^Cixi 



Fig. 7. Wing. The nervures are drawn slightly thicker than they naturally are. 



lui. Anal lobe. al. Alula, as. Antisquama. A. Anal cell. A.l. Anal nervure. 

 Cu. Cubital cell. 1 Cu. First cubital cell. cu.a. Cubito-anal transverse ner- 

 vure. CI. Costa. C. Costal cell. 1 C. First costal cell. M. Medial cell. 

 m.cu. Medio-cubital transverse nervure. m. Medial transverse nervure. 

 2 3/1., 2 M-. First and second second medial cells. M. 1+2. Medial longitudinal 

 nervure. 3/. 3 + C'». Medio-cubital longitudinal nervure. iJ.Kadial cell. i?. 1 to 

 i?.4 + 5. Eadial longitudinal nervures. ,SV. Subcostal cell. .S'c.l. Subcosta. 



The nervures of the wing are ochraceous. The anterior edge of 

 the wing (fig. 7) is formed by a stout nervure, the costa (C. 1) 

 which is very setose. The second longitudinal nervure, the sub- 

 costal {Sc. 1) joins the costal about half way along its length. A 

 small transverse nervure, the humeral (Ji.) divides the costal cell 



