191 ORDER nvMr.Norrr.RA. 



lai.tif MOM . ( Plate xxvli, flg. 7.) 



Color Murk. Siilil jill..\»i»h, with ii ^hnr]) riilne rxtrndinf; from Ihi- nnl«Ti"r auf,W to the 

 l>«.<M'<if ihi* wintf. S<T*«ij»l unci thlnl niMluniinul riiiKsoranKr, with \\iv i"»»t«riur |>arl of 

 thf !>ccuiid liinrk ujxin iho li'|i : U-m-alh, the orniifjv oilor r<.vrr> the enlirv riugs. 

 Fare nml Ick^ orntiKf , llw I'acv pair. .Viitniiiif tntircl) l>lack. Win^s tran.'>i<art:iit,aDd 

 wul>' illghtljr suiok^r. 



IiiiNcrMu;* . ( Plate xxTJi, fig. 9.) 



Color l>lnck. Wiiign Muoky l>r>wn. Autciiiiu- with u white annultis tx-ginniog aliout thv 

 sixth ring fh>m the ba»e. 



I'lMii.A LiNATott. (Plate I, fl(?^. 1, 2, 3, 1, 5, 6.) 



Antenmr i>r<'Wii, (iurkor at \mH'. Ky»'s Mark, llcail |in>»n, inrirrhd with a ring of two 

 yellow l>an<l!*,an(l one of a pnle brown : front yellow, with a lin)Wn hand extending 

 fnmi one eye to the other. Thorax hrown, marked U|M.n the toj> l.y a trident, or a 

 loncitudinnl hand terminating Ufore in throe divaricating lines. laterally there are 

 two hrond hrown l>nnd.«i parallel with the flr<it : U'tween the wings, the middle hand 

 divides and form.'i a circle, the ln.>ide of which is yellow. AlHlomen compress* d, sabre- 

 form and narrowed before. The seven rings of the abdomen are marked hysemllunatc 

 bands at their (Misterior margin, and succeeded by a black ring : the lateral parts of 

 the rings form an acute arch in the female, which enables her to flex the atxiomen as 

 repwsent*-*! in fig. 1. Alniomen greatly dilated at its extn-mity in the fi male, and 

 terminated by a greatly elongated ovijxisitor. Wines tran«par«'nt, and marked by « 

 bh>wn jmtch. In the male, the aUlomen is slemler. Legs yellow and lipht brown. 

 The female i» sf)metimes 1 \ inch long, w ith an ovij-ositor K>me three inches long. 



Fig. 4 : Femmlo in the act of iotrodacing it* OTipoadtor into the tnmk of a maple tree. 



Fig». 1 A li : Males. 



Fig. 5 : Fomalo at rest. 

 The yellow bunds n'pre»<nte<l as lunate, are prol>ably too sharply arched to admit strictly 

 of the apiM'llation. 



This iiusect formerly frequented a half-grown maple in the yard of the State House in 

 this city. I sii|>|>osed at lirst that the pimpla was attractiHl to this tree, in consetjuence of 

 the tircj- having also made it the place for iiei><>>itiiiK it.s eggs. The larvK of Ix^th insects 

 were found in Kreat numl>ers in dilTerent slitge^ of growth ; hut it ilid not appear that the 

 larvffi of the former fed uiH>n those of the latter, for they were K.th in many instances full 

 gMwn and s<'|>Jirate. In s>iiie c«.ses the pimpla jiiv-ed her ovi|>oMl<'r very near to a larva 

 of the sin-x ; hut it could not U- a-scert«me<l, after a very canful examination, that the 

 obji-cl of the first wus to pierce the larvjr which infestetl the tree, aller the niaiiuer of 

 Ichneurafn flus Still the habits of the family fav«->r the view that the larvirof the pimpla 



