'80 



in the " Entoinoloirisrs Intelligencer" for 1858. The following remarks arc 

 taken iVoni Newman's Puitish ]\I()tlis, 18G9: 



" I have li)iiu(i Ihe caterpillar of this geometer on (lie leaves of tlie com- 

 mon |)ersicaria (Poli/gonuiii pcrskarhi) ; hut I liave not descrihed it from 

 nature, as a xcA'y accurate description, which 1 have quoted below, was pre- 

 viously piiblislied in tlie 'Entomologist's Intelligencer' for 1858 : 'A lovely 

 female of I iiis species laid me some eggs on the 24th of July. They were 

 oblong, ilattisli, and yellow, l)ut changed to a dusky-brown color ou the 1st 

 of August. The tbilowing day, the caterpillars hatched. At first, they were 

 very dingy, but on tlie btli of August became dusky snp-green, and on Ihe 

 IGtli assumed tlieir characteristic markings. There were evidently two dis- 

 tinct varieties, one of which had the ground-cok)r of a grecnisli gray, tinged 

 will) red between tlie segments; the spiracular line blackish, and ii-regularly 

 interrupted; the back (except the last two segments) dusky, having on the 

 intermediate segments a row of five elongated diamonds of the ground-color, 

 with a dusky dot in each ; on the front segments, these markings ran into three 

 parallel dusky lines, while, on the end segments, there were four slender, dusky 

 lines arranged in a diamond pattern ; the claspers had a dusky stri[)e running 

 down them. The other variety had the ground-color of a light yellowish 

 green, quite yellow between the segments; the s|)iracuiar line and pattern on 

 the back liiintly indicated by dusky-black lines and dots. These caterpillars 

 fed readily on groundsel {Senecloxulgnris)^ at last eating through stems bigger 

 than themselves; but, as their I'rass seemed very watery, I doubt whether 

 this is their proper ibod. They were quiet in their habits, resting on the 

 under sid(! of the leaves, hiding themselves skillfidly, and could not be easily 

 dislodged. When disturbed, they curled up the front segments, but not into 

 such a twisted knot- as I have sometimes seen in more slender geometers. 

 From the 21st to the 2J(I of August, the catei'pillars, being full-fed, spun up 

 in moss. After liaving been in chrysalis about a foitnight, the perfect insects 

 emended. There wenit down two ot" the green and four of the darker cater- 

 piUars. These have come u[) again, one (J. Jlac'm'ji (male), and five C. gfiii- 

 DUiria (lemale), such a narrow risk did I run of missing the solution of this 

 problem. Solved, however, it is; and C.JlacUda and C. gcDimny'ia are hereby 

 declared to be man and wile. I expected to [\\\A the diiference of color in 

 the catei pillar would turnout to l)e a sexual one; this, however, has been 

 contradicted by the result. The chrysalis is lirown, smooth, sjjikeil at the 



