11G STATES OF INSECTS. 



This is the case with one of a butterfly named by Rose!' 

 Papilio morsa. The most common colour of the head of 

 larva?, where it differs from the rest of the body, is a 

 darker or lighter reddish brown, or piceous. This is 

 particularly observable in those of Coleopterous insects y 

 but it is very commonly in other tribes of the same hue. 

 Sometimes, amongst the Lepidoptera, the head is of a 

 different colour from the rest of the body; especially 

 where a contrast renders it striking, I can show the ca- 

 terpillar of some insect, probably of the hawk-moth tribe 

 (Sphingida?), from Georgia, remarkable for the length of 

 its anal spine, in which the body is black, and the head 

 red : another has a white head and a brown body. In 

 the larvae of some Lepidojitera, Coleoptera, and Diptera, 

 the head can be wholly or nearly withdrawn within the 

 first segment of the body. This may be readily seen in 

 that of the common glow-worm; and that of a small gnat 

 [Tipula rcplicata De Geer) withdraws it so completely 

 that the anterior margin of that segment closes the ori- 

 fice, so that the animal appears to have no head a . — 

 The parts of the head which require distinct considera- 

 tion are, the eyes, antennae, and the mouth .- consisting 

 of various organs, which will be specified. Some of these 

 parts and organs are peculiar to larva? of one order, 

 others to those of another, and some are furnished with 

 them all. 



Eyes. The larva? of many insects have no eyes. Those 

 with antennae which terminate in a lamellated clava 

 {ScarabcEus L.), and Capricorn beetles also {Cerambyx L.), 



a De Geer vi. 352. 



