HOMOPTERA. — CERCOPIDA. 43 1 
existence of a Chinese edict against young ladies keeping lanthorn- 
flies. 
One species of this family, having habits similar to the Aphides, is 
extremely injurious in the West Indian Islands from its attacks upon 
the sugar-cane, which it often entirely kills, from the vast numbers of 
individuals with which the plants are infested. I have described and 
figured this insect under the name of Delphax saccharivora (Mag. 
Nat. Mist. vol. vi. p.407.; andsee Trans. Ent. Soc. vol. i. App. p. 28. 
and 70. for further details of its destructive ravages). A very re- 
markable species has been described by Mr. Waterhouse, from New 
South Wales, of minute size, having only two wings, which greatly 
exceed the body in length, and are linear and rather spatulate at the 
tip (Alleloplasis Darwinii, Trans. Ent. Soc. ii. p. 194. pl. 17. f. 4.). 
Other instances in which the wings undergo a deficiency of develop- 
ment occur in the genus Delphax, the majority of which, in our 
English species, have the upper wings not covering more than half 
the abdomen, the terminal membrane being deficient as well as the 
hind wings. In certain seasons, however, especially hot ones, the 
wings are fully-developed. My jig. 115. 12. represents an imperfectly 
developed imago of Delphax anceps Germar ; and jig. 115.13. the 
wings of a fully developed individual. Mr. Curtis has formed the un- 
developed specimens into a different genus, Criomorphus. 

The third family, Cercopip”*, differs from the two preceding in 
having the antenne 3-jointed ( fig. 116. 10. antenna of Centrotus) ; 

* Breviocr. Rerer. tro tHE Cercorip». 
Germar, in Silberm, Rev. Ent. No. 17, 18. (Monogr. Membracidum) ; and _ his 
Magazin d. Entomol. No. 3, 4.; and Zeitschr. f. Entom. 
Laporte, in Ann. Soc. Ent. France, 1832 (Monogr. Heteronotus). — Ditto (De- 
script. n. genera). 
Lewis, in Trans. Ent. Soe. vol. i. (n. Brit. genera). 
Curtis, in Entomol. Mag. vol. i. 
Burmeister. Genera Insectorum.— Ditto, in Silberm. Rev. Ent. (Monogr. 
Darnis, &e.) — Ditto, Handb. d. Entomol. 
Gistl, in Faunus, No. 2. 1837. 
Waltl. Reise nach Spanien. 2 
Eversmann. List of Russian Species, in Bull. Mose. 1837. 
Kirby. N. Sp. Centrotus, in Mag. Nat. Hist. No. 6. 
Lesson, in Centurie Zoolog. (sp. of Centrotus), 
