. The American entomologist. Entomology. ENTOMOLOGIST AND BOTANIST. 331 A>, to llK liyi otIicM!, bio iLhtU liy I)i Beiiilmid • tli it Hit lorm q anculata is the onlj tiuegill m ikiDfe toim iiii I tli it botl / sponnfi a iu\\q i«a;Marc iii i iliii«i-> that i', iiit del iitly uliit*. 1 b\ th 11 I 1 tl I 1 I. ; V tc dimorph. s <, to c tticse tw. forms i I doiibtflil lit to piorliice 11 CSC t o for ture and j sent a n are, loljtl fact 1 other. II s V ry t e th t tl e galls, of cr mi 1 st ct c tiiiguished from one another, although they are the work of distinct gall-makors. Indeed, polytha
. The American entomologist. Entomology. ENTOMOLOGIST AND BOTANIST. 331 A>, to llK liyi otIicM!, bio iLhtU liy I)i Beiiilmid • tli it Hit lorm q anculata is the onlj tiuegill m ikiDfe toim iiii I tli it botl / sponnfi a iu\\q i«a;Marc iii i iliii«i-> that i', iiit del iitly uliit*. 1 b\ th 11 I 1 tl I 1 I. ; V tc dimorph. s <, to c tticse tw. forms i I doiibtflil lit to piorliice 11 CSC t o for ture and j sent a n are, loljtl fact 1 other. II s V ry t e th t tl e galls, of cr mi 1 st ct c tiiiguished from one another, although they are the work of distinct gall-makors. Indeed, polythalamous galls are very generally more difficult to characterize than monothalamoiis gajls, because their shape and tize depend upon the number of gall-making larva; that they contain, which will often vary from two or three to two or thi-ee score. Monothalamoiis galls, on the contrary, are as definitily limited in size and shape as are the great'majority of tti^ In!! ii n; .pi i iis of in- sects; and moreover, as a rule, ii; ii .h more numerous and more accurately diin, (.,. ri,.ii ,, i, is than do polyllnilanioils gulls. Now, ill ihai \\ii;irellow conririii il w nil -I Ikii 111 ' v'"/ ' ?'?' ? ' —i^ a monothala- moiis .1 ill I i' ? III ? I 'ili/ed, and just .as easily 11 i ? aii . 1, i 11 i i ? . i i" h, nr a plum; and, moreu\n-, ihu ^ .lull |,niilui;i. Uiu .luLunuial dimorphousf form ((/. acUuliita) occur upon the very same tree, and in company with those that produce the vernal bisexual form (<7. spongijica ^Q). Dr. Weiiiliard, in the paper already referred to (p 7), in ronliiiiiatiou of his second hypothesis of C. q. spongijica and C q iiiiiulata being each of them true gall-makers, produc- ini; ii|)M ihc same plant galls that are apparently, but not really, identical, quotes the following two European cases of iinilistinguishable galls being produced upon the same plant by distinct insects: 1st. Two exactly similar twig-galls on blackberry, p
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectentomology, bookyear1
