LEPIDOPTERA.— GEOMETRID&. 395 
end; and Thyatira also a naked one, but furnished with a number 
of conical tubercles throughout the whole length of the body. Those 
of Catocala are strongly fimbriated at the sides of the body; in 
Acosmetia there are only six ventral feet (jig. 108.18. larva of A. 
fuscula) ; whilst in Plusia (fig. 108. 9.) and Euclidia, which have 
semi-geometrical larvee, there are only two pairs of ventral feet ; those 
of the last-named genus are quite vermiform in their appearance, and 
having the habit of twisting themselves about in all directions (fig. 108. 
17. larva of Euclidia Mi.). That of Erastria has only ten feet (Hubn. 
Curt.). 
M. Guénée, in his memoirs upon this family, in the sixth vol. of the 
Annal. Soc. Entomol. de France, 1837, arranges the species into the 
eighteen following tribes :—1. Bombycoidi; 2. Pseudo-Bombycoidi ; 
3. Bryophagidi; 4. Nonagridi; 5. Leucanidi; 6. Noctuelidi ; 7. 
Amphipyridi; 8. Miselidi ; 9. Hadenidi; 10. Orthosidi; 11. Xylinidi; 
12. Heliothidi; 13. Ctenoceridi; 14. Plusidi; 15. Catocalidi; 16. 
Ophiusidi ; 17. Noctuoidi ; 18. Noctuo-Phalenidi; in addition to 
which he has described another tribe, Noctuo-Bombycoidi, consisting 
of the genera Ceropacha, Cymatophora, Tethea, and Cosmia*, the 
larvee of all of which live amongst the leaves of trees, which they 
fasten together with silken threads. 
The tenth family, Grometrip% + Steph., is one of nearly equal 
extent with the Noctuide, from which it is distinguished by its 
general weakness of structure, slenderness of body, but more par- 
ticularly by the remarkable peculiarities and mode of progression of 
the caterpillars, which has supplied the name of the family (jig. 109. 
* Fig. 108.8. represents the under side of the abdomen of a specimen of Cosmia 
trapetzina, in order to show the two large pencils of hairs which are at times ex- 
serted and erected, and at other times lie close upon the body, to which allusion has 
already been made in preceding pages. (See also Knoch, Beittrage, vol. iii. pl. 5. f. 6. ; 
Annales Soc. Ent. France, tom, i. part.2.; Kirby and Spence, vol. iv. p. 59.3; and 
Curtis, 635 f. A*.) 
+ Brstrocr. Rerer. to THE GEOMETRID A. 
Audouin. Obs. sur une Chenille du g. Dosithea, in Ann. Soc. Ent. France, 1834, 
Eversmann, in Bulletin Soe. Nat. Moscow, 1837. 
Rambur, in Ann. Soe. Ent. de France, tom. i. part 3., and tom. ii,; and the general 
works on Lepidoptera aboye referred to. 
