144 STATES OF INSECTS. 



&c. have two pairs, one attached to the anal and the 

 other to the first segment a . Tipula amphibia De Geer 

 in this state has ten prolegs, placed by pairs on the fourth, 

 fifth, eighth, ninth, and tenth dorsal segments b ; and 

 Scceva Pyrastri F., one of the aphidivorous flies, has not 

 fewer than forty-two, arranged in a sextuple series, seven 

 in each row c . 



It may not be useless to close this long description of 

 the legs of larvae with a tabular view of them, founded 

 chiefly upon these organs; which afford very obvious 

 mai'ks of distinction. 



I. Larva} without legs. 



i. With a corneous head of determinate shape (co- 

 leopterous and hymenopterous apods — Cidicidce, 

 some Tipulidce, &c. amongst the Diptera). 



ii. With a membranaceous head of indeterminate 

 shape (Muscidcs, Syrphida, and other Diptera). 



II. Larvae with legs. 



i. With legs only, and with or without an anal pro- 

 leg (Neuroptera, and many Coleoptera). 



1. Joints short and conical (Elater, Cerambyci- 

 d<z, &c). 



2. Joints long and subfiliform (Staphylinus, 

 Coccinella, Cicindela, &c). 



ii. Prolegs only (many Tipulidce, and some subcu- 

 taneous Lepidopterous larvae, &c). 



iii. Both legs and prolegs {Lepidoptera, Tenthredi- 

 nidce, and some Coleoptera). 



1. Without claws {Tenthredinidae, &c). 



2. With claws {Lepidoptera, &c). 



a De Geer Ibid. /. xxiv.f. 15 — 17. >> Ibid. 383. 



e Ibid. 111. t.\i.f. 14— 1G. 



