1868.J > ]^97 



„ 15. PronopJiila, Westwood (1851). Type, P. Thelehe. 

 „ 16. Coroc^e^, Doubleday (1848). Tj^q, C. Enyo. 



Division K. 



Cella posticarum elougata, apicem ad nervulse tertise medianse 

 originem formante (velut in sectione A), cella autem anticarum, velut 

 in Eurytelidis, perbrevi. 

 Genus 1. Ptychandra, Felder (1861). Type, P. Lorquinii. 



This last genus may possibly not belong to the SatyridcB ; the very 

 short discoidal cell of the fore-wing brings it near to the EurytelidcB. 

 British Museum. 



A LIFE HISTORY OF GBACILARIA SYBINGELLA. 

 BT CHAELES HEALT. 



{Concluded from page 177.) 



The mode of procedure when the larva forms its cocoon on the 

 surface of a leaf is this : it places itself at full length in a de- 

 pression of the leaf, slightly raises the anterior segments, and moves 

 its head from side to side, thus carrying a silken thread across, which it 

 fastens to the leaf, till a sufficient number of these threads bave been 

 spun ; it then raises itself up till the centre of its body rests on the 

 threads it has spun, its hinder segments still resting on the leaf below ; 

 then, using its body as a measure, it stretches forth its anterior segments 

 and begins the fabrication of one half of the outer covering of its 

 cocoon ; this is done by carrying silken threads from side to side of the 

 depression in the leaf, the larva gradually retreating backwards- 

 When the first half of tbe cocoon canopy is completed, the larva 

 descends from its elevated position, turns round, and after inserting its 

 hinder segments beneath tbe canopy just spun, it again raises its 

 anterior segments and spins a few more silken threads, precisely as 

 before, and, climbing on to them, it constructs the second half of tbe 

 cocoon canopy like the first. 



Whilst the larva is engaged in this occupation, as long as the 

 observer keeps at a moderate distance, it continues its labours, but 

 should he approach too near it ceases to work, and, after looking 

 steadfastly at the intruder for a few seconds, retires under the partially 

 formed canopy till the annoyance is discontinued, when it at once 

 resumes its operations, and, if not interrupted, continues until it 

 has entirely completed its task. The larva then crawls about on the 



