LYCAENINAE: THE GENUS RUSTICUS. 959 



meiits more widely separated than on theabdomiunl; small papillae with comparatively 

 sliort, baclvward directed, subrecumbcnt hairss just behind tlie preceding, on the sec- 

 ond thoracic to the sixth abdou\inal segments; next, a lateral series of anterior, 

 central, large annuli (becoming infnilateral on tlio third tluiriuic, higli snpralatcriil on 

 the sixth to eiglitli abdominal, and very large on tlie sixtli a))iloniinal segments) extend- 

 ing from the second tlioracic to the eiglith abdominal segments; an infralateral series 

 of smaller circlets on tlie tii'st to seventh, but becoming larger and lateral on the sixth 

 to seventh abdominal segments; a laterostigmatal series of minute annuli, two to a 

 segment, the anterior the lower, on the llrst six abdominal segments, found also, but 

 carried higher up and the hinder greatly enlarged, on the seventh abdominal segment; 

 also ou the second thoracic segment, but at same level and the anterior one only ; 

 Anally, a ventrostigmatal series of three high papillae, eadi bearing a hair, placed in an 

 oblique series : the anterior lowest and bearing a comparatively short, straight, granu- 

 lated hair, directed outward anil a little forward ; the middle a larger, straight, granu- 

 lated hair directed outward; and the posterior the shortest, a gently curved, gently 

 clubbed, smooth hair, directed backward and outward. Vlate 71, fig. 4 is wrong 

 in making the infralateral and laterostigmatal lenticles into short bristle-bearing 

 papillae. 



Mature caterpillar. Head well rounded, higher than broad, deeply and broadly 

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

 the frontal triangle; the latter lialf as liigh as the liead and Ingher than broad; ocelli 

 composed of Ave equal, equidistant, roundish oval lenticles forming the quadrant of a 

 circle with a sixth similar one .at its centre. 



Body liigh, tectiform, tlie summit depressed in a narrow dorsal area, which broadens 

 a little on the thoracic segments; anteriorly it falls ofl' 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, subdor- 

 sal papillae in the stages following the first, which are lost in the last stage, when the 

 body is covered with a promiscuous assemblage of equally and rather closely distrib- 

 uted, very short and unequ.al, pointed hairs, arising from .small, stellate papillae. A 

 transverse slit in the middle of the dorsum of the seventli abdominal segment appears 

 In the third stage, but apparently the caruncles of the eighth segment (86 : 14) do not 

 appear until the fourth stage, when they are wider apart than in Cyaniris. Spiracles 

 exceednigly minute, sliglitly 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 Ijeing consideraljly 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 meso- 

 thorax, behind wliich it is almost level, and in front of whicli it slopes regularly and 

 rapidly to the base of the antennae. Abdomen but little higher than the thorax, 

 highest at the third segment, very broadly arched, but at last falling ofl" rapidly behind 

 exactly as in Cyaniris; transversely it is cylindrical, but the sides of the mesotliorax 

 slope toward each other at an angle of about 85"-, the summit well rounded. Tongue 

 exposed three-fifths way to tip of antennae. Body covered with a reticulation of 

 raised lines much as in Cyaniris. but more delicate and the hairs much shorter and 

 blunt tipped. Hooklcts of crcinaster with a slender, gently arcuate, rather long stalk, 

 rapidly expanding and curved over into a rather tight roll at tip, the outer apical 

 angles produced into a tiny claw. 



Distribution. This genus is widely distributed with numeroue mem- 

 bers over the nortli temperate zone of both hemispheres, but within some- 

 what different climatic limitiitions ; in the Old \A'orld and in the w estern 

 half of the New World, it inhabits warmer regions than in eastern North 



