TIIK TRinKS OK LYCAENIXAE. 797 



but not nil, possess also a pair of lateral evaginahlc caiiincles on the back 

 of the succeeding segment.* No such abdoniinnl structures are known 

 in the caterpillars of any other grouj) of butterflies. 



The ciuysaliils are short, plump and ovate, rarely with the slightest 

 angulation, the head always and the terminal segment almost always upon 

 the under surface of the body, in which character they differ from nearly 

 all other butterflies. 



The Lycaeninae usually pass the winter either in the egg or chrysalis 

 state; occasionally perhaps as cateq)illar8 but never as buttei-flies. When 

 they winter as ehrysalids they frequently select as a place of hibernation 

 a station on or close to the ground. In general they appear to be single 

 brooded, although occasionally two or even three broods of a species 

 may succeed each other in the course of a season. They are usually soli- 

 tary in their habits, although occasionally a colony of caterpillars is 

 found on a single i)lant or cluster of plants. Professor Westwood long 

 ago published curious accounts of an Indian species, small companies of 

 which live in the caterpillar state in the interior of pomegranates and even 

 undergo their transformations within the fruit. (Trans, ent. soc. Lond., 

 ii:l-8, pi. 1.) 



Table of tribes of Lycaeninae. based on the egg. 



Egg flattened tiarato, almost as much depressed above as truncate below ; central depression 

 of summit (ineludinir, but not limited to, the micropylic pit) one-fourth or more the diameter 

 of the egs. or the whole summit flat; angles of cells marked by prominences risin;; conspicu- 

 ously above the general surface. 

 Generally larger, the central depression (as above) covering one-fourth to one-half the 



width of the egg, the micropylic pit generally deep ThecIUll. 



Generally smaller, the central depression generally covering from one-half to three-fourths 



the width of the egg, the micropylic i)it comparatively shallow Lycaenidi. 



Egg domed tiarate, much less depressed above than truncate below, the central depression of the 

 summit less than one-eighth the diameter of the egg, the whole summit otherwise distinctly 

 convex; angles of cells without, or with only slight, prominences Chrysophanidi. 



Table of tribes, based on the caterpillar at birth. 



Held noticeably narrower than the body ; first thoracic segment scarcely larger than the others ; 

 last three abdominal segments more or less fused and furnished above in the centre with a 

 large, sunken, subcircular area, in front of which on either side is a curving series of sev- 

 eral smooth, naked papillae Theclidi. 



Head nearly or (luite as broad as the body ; first thoracic segment distinctly larger thau the 



others ; seventh abdominal segment wholly free and with no papillae besides those of the 



longitudinal series. 



First thoracic segment not greatly larger than the others ; last two abdominal segments 



fused; uppermost range of bristles laterodorsal, these generally not much longer than 



the width of the body Lycaenidi. 



First thoracic segment generally very much larger than the others ; the eighth abdominal 

 segment wholly free; uppermost range of bristles subdorsal, generally almost or ((uite 

 half as long as the body Chrysophanidi. 



' See also the Inlroduition. p. !.">; and Proc. Bosf. soc. nat. hist., xxiii : S.JT-SoS. 



