MEMOIRS OK TIIK NATIONAL ACADK.MV OF SCIENCES. 205 



■uniconiis. 'I'liis appears lo bn a, c.limaUc variety, Ibllowiiii;' (lie same Ian ol' eliiiuilie variation as 

 we liave already rel'erred lo. 



/v/(/. — •■ (Ireeiiisli lo yellowisli uray in color; transverse diametor, S mm.; liemlsplierical, not 

 llatlened; siirlace under In^li power, witli elevati'd ridji'es lorndin;- I'aeets. j\ sli^iit irref^ular 

 rougiienins occurs about liie niicropylar region.'' ('•Deposited ineaplisily in I<'eb." liiley MS.) 



Larra. — Tlie (irst stage of S. «»/coc»/.s- did'ers l)ut sligiitly Irom^ tliatol' »S'. ijmincir. Leiigtli, 

 '2 mm. The liead and body are of tlie sa.ine proportions, llie protlioraeic tubercles of nearly tin* 

 same size, but. those on the back of the lueso and nielaliioracic segments are larger llian lu »S'. 

 iniicortiis. 'I'he lnl)ereles on the alidoininal segmenls are of nearly the same |irop<irli<iiis, bnl, 

 .slightly larger. 



The first, third, and eighth abdominal segments ari^ bright red in iinivorniK as in ijiomctr, and 

 the colors and markings in gxMuu'al scarcely different from those of ipoiiicd'. The anal legs arc the 

 same in size and i)ositioii in the two species, but the tubercles are on I he wlioki larger in ipomea'. 



The hairs ai'e davate in niiirornis and of tlici same proportionate lenglli as in ijionutv. 



It thus appears that no geiiiiine six'cilic, dilfereiices exist between the I'reslily iiatclied larvae 

 -of S. ipomew and unicornis and most probably IcptinouJcs, though the caterpillars art^ so dilfcrent 

 ■when fully fed. On the other hand, though we do not know the earliest stages of the ol her species 

 of Schiznra, yi't from our knowledge of tliose of J)(tmil(>phi<t (tiKju'niu there seems little doubt that 

 the generic characters are (piite clearly indicated in the lirst stage; that is, it will always be easy 

 to separate Selii/.nra larva' just after hatching from Ihoseof any other genus of Notodonti;ins, 

 while if specimens of iS. ipomnv and viiieoniis of the first stage were- mixed together it would be 

 almost impossible to safely sel)arat(^ them aecoiding to the species, the ineipieiif specilie characters 

 ai'tually existing being loo slight and indecisive. 



Length, -0 mm. Lody much compressed; head not so wide as the body, comiiressed, llatlened 

 in front, elevated toward the vertex, cleft, ending in two lonnded <(niieal lubeicles, pale rust red, 

 densely marbled with a line net-woik of darker lines, liody i)ale rust red, with a i)al(^ pea-green 

 ]>atch on the side of the second and third thoracic segmeuls, not rcnicliing to the;interior s])iraclc. 

 I'irst abdominal segment with a. large high acute conical tubercle, bearing at tiii two very 

 slender, spreading, brown cylindrical tubercles. On lifth a slight hum|), bearing two small 

 warts; eighth segment bearing a, rather liirg(; dorsal liiimp, supi)ortiiig two (hirk wai'ts; in front is 

 a broken V-shaped silver mark, the ai)ex directed forward. Anal legs brown, held out, with end 

 of body, horizontally, 'i'hree lateral obscure, obliipie lines connecting with a daik, obscure, lateral 

 straight line placed some distance above the s])iraeles. I<'eet all rust-reddish, thoracic; feet ])aler. 



Length, LM mm. lias a shorter smaller dorsal retractile tuberch^ than in S. ijiomcif. Tlioracii; 

 segments peagrcen; the dor.sal V-sliai)ed mark on the scveuth segmcMit is prolonged to Ihe front 

 edge of the sixth segment, this part really forming a sei)arate narrow V, in front at' Ihe apex, of 

 which on fourth and liflh segments each is a dusky brown patch, bet ween Ihe r(^ddish Itrown 

 piliferons wails. 



Belbie th(^ last moll the larva is the salll(^ as the maliire form. Length, l."> to IS mm. 



The dorsal liump is not so soft and retractile or sensitive as in the lar\a of A'. Icpliiioidc.s. 



" It is a very singularly shaped caterpillar, (leueral color in sound specimens, rich reddish 

 brown, in others grayish brown, shaded with very ininnh^ spots of a darker color, wiiieh give it a 

 shagreencd api)carance. A faint line of a darker color runs along each side from the third segment. 

 It is Variegated on the back with a lighter (;olor-, somewhat in Ihe shaiieof a letter W as one looks 

 from the head, and two lines tbrminga V mark. 



"Larva" tbnnd on the blackberry were mostly very i)alc, with the white Y mark on Joints 9 

 and Id \-ery |dain, with much glaucous color about the back, and with the other shades of ]iur|)le- 

 brown, llcsh-brown, olive and |)ale green, which are found on the withering bhickberry bushes, 

 all present. The giaiu^ous and brown colors are especially noticed on the canes of this ])l;int." 

 <Eiley in Fifth Kep. TT. S. Fnt. Comm.. p. L'(!!).) 



(Uiciiiin. — '-Thin and almost trans])aient, resembling parchment in texture, and covered generally 

 with bits of leaves oii the outside" (Harris). The l;irv;i spins a silk cocoon with the debris on the 

 outside. Judging by a specimen in the United States National Museum. 



