154 BRITISH BUTTERFLIES. 



Mature caterpillar: Head well rounded, higher than broad, deeply and 1 

 broadly cleft above between the hemispheres, so as to barely escape reaching the 

 summit of the frontal triangle. ; the latter half as high as the head, and higher than 

 broad ; ocelli composed of five equal, equidistant, roundish oval lenticles forming 

 the quadrant of a circle, with a sixth similar one at its centre. Body high, tectiform. 

 the summit depressed in a narrow dorsal area, which broadens a little on the 

 thoracic segments ; anteriorly, it falls off rapidly, and posteriorly, the body becomes 

 depressed, and the last segment well-rounded. Viewed laterally, the summits of 

 the segments are prominently moniliform, with distinct, elevated, subdorsal papilhe 

 in the stages following the first, Avhich are lost in the last stage, when the body is 

 covered with a promiscuous assemblage of equally, and rather closely distributed, 

 very short and unequal, pointed hairs, arising from small, stellate papilla?. A 

 transverse slit in the middle of the dorsum of the seventh abdominal segment 

 appears in the third stage, but apparently the caruncles of the eighth segment do 

 not appear until the fourth stage, when they are wider apart than in Cyaniri*. 

 Spiracles exceedingly minute, slightly oval. 



Chrysalis : Long and slender, being about three times as long as broad ; 

 viewed from above the sides are straight and slightly divergent along the line of 

 the wings, beyond which the abdomen forms a regular elliptic curve ; the basal 

 wing-tubercle is tolerably prominent, but well-rounded, the prothorax being 

 considerably narrower than the body at the wing-base, and in front roundly and 

 shallowly emarginate. Viewed from the side, the thorax is highest a little behind 

 the middle of the mesothorax, behind which it is almost level, and in front of which 

 it slopes regularly and rapidly to the base of the antenna?. Abdomen but little 

 higher than the thorax, highest at the third segment, very broadly arched, but at 

 last falling off rapidly behind, exactly as in Cyaniris ; transversely it is cylindrical, 

 but the sides of the mesothorax slope toAvard each other at an angle of about 85 J , 

 the summit well-rounded. Tongue exposed three-fifths way to tip of antennas. 

 Body covered with a reticulation of raised lines much as in Cyaniris, but more 

 delicate, and the hairs much shorter and blunt-tipped. Hooklets of cremaster with 

 a slender, gently arcuate, rather long stalk, rapidly expanding and curved over 

 into a rather tight roll at the tip, the outer apical angles produced into a tiny claw. 



Our knowledge of the relationships of the various genera included 

 in this tribe is infinitesimal, our ignorance colossal, and we can here 

 only indicate some of the self-evident sections, a later knowledge of 

 the detailed structure of the species of which, in all their stages, will 

 alone allow them to be defined with greater accuracy. It were easy to 

 follow the well-patronised method of ignorance, and include them all 

 in one omnibus ''genus," or even to pretend knowledge by subdividing 

 such a "genus" into numbered groups without definition. Our 

 various references to different species, in this, and the preceding 

 volumes, will have made our readers conversant with the names of 

 some of these sections, i.e., genera, which we may here illustrate by 

 reference to the British, and some of the better-known Pahearctic 

 species referable thereto, especially such as have come under our notice 

 alive. We may thus note — 



Pi.ebeius Plebeius argus {(ie<jon) (type), P. argyrognomon, P. lycidas, etc. 



Vacoinhna- Vai'ciniina optilete (type). 



A.RIOIA- Arieia aatrardhe, (type). .1. psylorita, A. Idas, A. eumedon, A 

 donzelii, etc. 



Cyaniris Cyaniris semiargus (type). ('. persephatta, etc. 



Polyommatus Polyommatus eros, P- icarus (type), P. amanda, P. eacfieri, 

 P. hylaa. 



EIinsuTiNA Hirnutina <l<inu»i (type), //. dolus, If. admetua, etc. 



A.lbulina Albulina pheretea (type). 



specimen become, as time goes on, more transparent and more invisible. The con- 

 clusion one arrives at as to P. acudderii, then, is that the figure is correct, but on 

 comparing it later with the (preserved?) specimen, the hair-bases, resembling 

 lenticles, were seen, but the hairs themselves could not be detected. 



