NVMPIIALINAE: THE GENUS ARGYNNIS. 547 



placed nearer toijetlier than the}', and around the raicropyleforminj? a rim. Micropyle 

 rosette made up of nunutc roundish cells separated by distinct, but coarse, low and 

 rounded ridi^cs. 



Caterpillar at birth. Head smootli, broadest in tlie middle of the upper half, well 

 rounded l)el()\v, with a few scattered, pretty long hairs arisinsj: from minute warts. 

 Body plump and cylindrical, tapering only at the extreuuty ; eacli segment behind the 

 first thoracic furnished Avith several series of papillae giving rise to very long, very 

 slender, scarcely tapering, slightly curving, very distantly and excessively minutely 

 spiculiferous hairs, terminating, excepting on some of those of the terminal segment, 

 in a minute, short, cup-shaped club, whose diameter is equal to that of the base of the 

 hair, and is a little narrower than long; the series are disposed as follows: a sub- 

 lateral, each papilla bearing two hairs, the hinder one a little nearer the middle line 

 than the other and longer, a supralateral posteriorly placed, an infralateral centrally 

 placed and an iufrastigmatal cluster of four. Legs long and slender, the last joint 

 conical, the claw small, strongly bent, tapering, Avith a small ))asal heel ; prolegs unusu- 

 ally long and slender and approximated so that there is an unusual space between their 

 outer side and the spiracles. Ilooklets Ave in number, strongly curved, in juxtaposi- 

 tion, arranged in a semicircle, the outer end uppermost. 



Mature caterpillar. Head pretty small, well rounded, but anteriorly appressed, sub- 

 quadi-atc, broadest in the middle, the hemispheres separated above by a deep sulcation, 

 the sides rather broadly rounded, i-ather deeper below than above; triangle uot very 

 much higher than broad, extending more than half way up the head, covered with 

 sparsely scattered, very minute, blunt warts, giving rise to hairs of varialjle lengths, one 

 to each, of which those above and outwardly are usually the longest. Antennae with the 

 second joint uot half so long as broad, third more than half as broad as second, and 

 more than twice as long as broad, fourth invisible in dried larvae. Ocelli six in num- 

 ber, five in a curve bent at right angles with the angle well rounded, the three middle 

 ones separated by less than their own width, the outer ones by a little greater distance 

 from their neighbors ; the sixth is behind the others, at equal distances from the upper 

 and central one of the row, and at a scarcely greater distance from the lowest ; they 

 are all of nearly equal size and prominence, but the loAvest is a little the most promi- 

 nent. Labnun small, rather broad, well rounded, pretty deeply and roundly excised in 

 the middle of the front; mandibles very small ; maxillary palpi with the second joint 

 about as long as broad, small, rounded; third somewhat slenderer, twice as long as 

 broad, cylindrical. 



Body greatly elongated, cylindrical, tapering considerably forward on all the 

 thoracic segments, armed with very long, conspicuous, erect spines, scarcely broaden- 

 ing at the extreme base ; the spines are usually very slender, straight, erect, delicately 

 tapering, terminating in a fine pointed needle, often much shorter than those which 

 ornament the sides of the spine, where they are needle-like and moderately long, 

 directed upward at an angle of about 45° with the main spine, simple and seated on 

 small, wart-like spinules : they are irregularly disposed, but are cousiderabl.y more 

 uumei'ous on the basal than on the apical half of the spine, and are sometimes also 

 scattered along the body in fi'ont of the spines, especially of those on the sides; 

 otherwise the body is absolutely naked, excepting for a sparse microscopic pile. The 

 spines vary in length in diflerent species, but most of them are seldom or never less 

 than half as long as the greatest width of the body ; they are arranged in longitudinal 

 rows, one to a segment in each row, as follows : a laterodorsal series placed centrally 

 on the thoracic and fii'st to ninth abdominal segments, that of the first thoracic seg- 

 ment sometimes equal to, sometimes of much greater length than the others; a latero- 

 stigmatal series placed centrally on the first to eighth and tenth abdominal segments ; 

 a suprastigmatal series placed next the suture between the thoivacic segments ; an iufra- 

 stigmatal series placed centi-ally on the first to eighth abdominal segments, and repre- 

 sented also on the second and third thoracic segments by small, spinous warts placed a 

 little lower down ; and a ventro-stigmatal series of small, spinous warts, placed cen- 

 trally on all the segments; spiracles small, obovate, about half as high again as long. 



