SYSTEM OF INSECTS. 389 



appear. The above reasons will, I trust, justify me for 

 considering them at present as belonging to different 

 Orders ; but if further discoveries should confirm the 

 opinion Mr. MacLeay espouses, I shall have no hesita- 

 tion in yielding to it. 



DEF. Metamorphosis incomplete 2 . 



Mouth emandibulate. 



Proihorax replaced by a collar. 



Wings four, upper pair mostly hairy, lower 

 ample, folded : neuration branching. 



Anus without setae. Eggs extruded in a gela- 

 tinous mass 5 . 



9. LEPIDOPTERA C (Glossata F.). Concerning this 

 Order, no difference of opinion exists amongst Entomo- 

 logists. Besides the scales that cover their wings, they 

 are distinguished by the peculiar instrument of suction 

 formerly described : neither of these characters, how- 

 ever, is perfectly universal; some of the Order (Nudaria) 

 having no scales upon their wings, and others being 

 without any antlia (Aglossa). Other peculiar characters 

 are to be found in them ; for instance, the patagia, or 

 tippets, that adorn their evanescent thorax d , and the 

 tegulcz, or base-covers, of a shape quite dissimilar to 

 those of Hymenoptera, which cover and defend the base 

 of their wings e . As in the last Order, their legs are 

 located all together with scarcely any space intervening 

 between them; and they often agree also in their spurs. 



3 This is evident from De Geer's account. Ibid. 516. L xii./. 14. 

 /. xv. /. 4, 



b PLATE XX. FIG. 25. c From Ksirts, a scale. 



d VOL. III. p. 537. PLATE IX. FIG. 4. e Ibid. FIG. 5. 



