8 Mr. S. S. Saunders 07i 



conjunction with the short mediastinal nervure, more or 

 less separate and distinct in itself; followed by the ^os^- 

 costal, furcating at its base with the externo-medial or 

 ^' third ■principal nervure of the wing," traversing the disc 

 more or less, and corresponding (as it would seem) with 

 what Kirby has described as the '^ transverse fold in the 

 middle" of a Coleopterous wing (Linn. Trans., I. c, p. 

 101) ; in some instances continued to the exterior mar- 

 gin, as in Myodites and Bhipiphorus. 



Kirby and Spence divide the fore-wing into three 

 areas, namely the Costal [Area costalis), the Intermediate 

 (Area intennedia) , and the Anal [Area analis) ; i\xe first 

 of which comprises (in Coleoptera) " that part of the wing 

 lying between the anterior margin and the postcostal 

 nervure :" the second, " that part of the wing lying be- 

 tween the costal area and the anal nervure : " and the 

 third, " that part of the wing which lies between the anal 

 nervure and the posterior margin." The externo-medial 

 nervure as aforesaid may serve to divide this inter- 

 mediate area into two sections, which I have defined 

 in the following pages as the upper and lower interme- 

 diate areas [area intermedia superior and inferior) ; 

 the former of which is usually furnished (as in Myodites 

 and Hhipiphorus) with ttvo insidated nervures, either 

 double or single, extending backwards from the ex- 

 terior margin, though not always in connection there- 

 with ; situated between the costal area and the trans- 

 verse externo-medial nervure ; the first being near the 

 apex of the wing and nearly parallel to the costa {neura 

 prima instilata apicalis) ; and the second, between the first 

 and the externo-medial (neura secundainsidata discoidalis) , 

 usually longer than the first, and frequently brought 

 into close proximity with the externo-medial itself, so as 

 to appear in some cases almost furcate therewith, although 

 typically insulated. Some of the other nervures also 

 exhibit a tendency to assume a double form. 



The lower intermediate area presents always an uniform 

 type of tJiree somewhat approximating nervures radiating 

 from the base of the wing, inspissated from their origin 

 and becoming exceedingly slender beyond the centre, 

 although prolonged in a straight line to the exterior 

 margin. These nervures may be considered to cor- 

 respond with the interno-medial (or "fourth principal 

 nervure"), the suhinterno-medial, and the a^ial, of Kirby 

 and Spence. 



