CHALCIDIDiE. 
357 
gnll Q. seminator, Harr. ; E. punctiventriSf ibid., from gall Q. mmmna, 
Walsh j E. nhnormicorms, ibid., $, taken at largo; E, dirntrophi, ibid., 
from bramble-gall of DiastropJms ncbulosus, O.-S. [var. holteri, Biley, from 
lepidopterous gall of Gelechia gallcBsolidaginis, Biley, recharacterized] ; E. 
gigantea, p. 300, 5 taken at large. E. studiosa (Say) is recorded (p. 299) 
as being bred from four diflerent Cynipidoiis oak-galls, from five different 
Tenthredinous willow-galls, from six different Cecidomyidous galls on willow, 
goldenrod, and ironweed, from Aphidian and Coccidoiis leaf-galls on shell- 
bark hickory, and from fungoid growth on pignut hickory. These are all 
stated not to differ from Say’s species ; but slight colour vars. have been also 
bred from two other oak-galls. The N. American spp. of Decatoma are 
tabulated (p. 300), and the following new spp. and vars. described : — D. 
varians, ibid. f. 2, from oak-galls Q. podagra>,, Walsh, Q. spongifica, Q. 
majiis, and Q. palustris, O.-S., and var. duhia from Q. mammae Walsh; 
E. nigricepSy ibid., from oak-gall Q. ficus, Fitch, and var. excrucians, p. 301, 
from gall Q. seminator, Harr. ; Z). liyalipennis, ibid., ^ and $ taken at large ; 
Z>. simplicistigma, ibid., from Cynipidoiis oak-gnlls, Q. erinaccus, Walsh, Q. 
pctiolicola, Bass,, and Q. ficus, Fitch ; Z). nuhilisiigma, ibid., from Cecido- 
myidous willow-gall S. batatas, Walsh, and an undescribcd gall on swamp 
white oak. Isosoma hordci (Harr.) is again discussed (pp. 329, 330) and 
figured (figs. 3 4), with details, and a long and interesting digi’ession upon 
dimorphism in Cynips is made, as bearing upon the author’s proposition that 
many insects, absolutely undistinguishable externally, yet of widely different 
habits, may be taken as differing widely internally, and therefore as being 
specifically distinct. On the other hand, the author admits that many di- 
morphous forms of the same species are probably now erroneously considered 
to bo distinct. The author proceeds to recharacterize (p. 307) Scmiotollus, 
Westw., so as to properly include in it a new species which he had hitherto 
referred to Glyphe. This is S. chalcidepJiagus, sp. n., p. 308, f. 7, parasitic 
upon Isosoma hordei (larva also described). Finally, Walsh describes a new 
genus of Encyrtides, viz. Antigaster, p. 308, in which the body is capable of 
rolling up in the contrary way to that of Chrysis. Sp. A. mirabilis, sp. n., 
Walsh, 1. c. p. 309, f. 9 5; Bock Island, Illinois. The ^ , bred from eggs of 
Ehylloptera oblongifolia, is described by Biley, ibid., and figured with its 
pupa &c. f. 10. 
Mulleu (Ent. M. M. vii. p. 00) notes the abundance of pupie of the ^ of 
Callimome devo?iiensis, Bftt., in small galls of Cynips lignicola, Htg. 
Blephonira, g. n., Holmgren, Eugenies Besa, Ins. i. p. 438 (no comparative 
diagnosis given). E. fulvipcs, sp. n., Holmgr. ibid. Taf. viii. f. 0, China. 
Oomyzus, g. n., Bondani, Nota &c. p. 6, Sp. O. gallerucce (Fonscol., 
Pterom.), parasitic upon eggs of Galleruca xanthomclcena. 
New species : — 
Cholcis maculata, p. 434, variegata and pallida, p. 435, I. Puna; suh- 
fasciata, p. 430, Buenos Ayres : Holmgren, 1. c. 
Chalcis maria, Biley, Amer. Ent. ii. p. 101, note, fig. 00, bred from Attacus 
polyphemus and A. promethea, Kentucky. 
Chalcis (^Aphelinus) mytilaspidis, Le Baron, Amer. Ent. &; Bbt. ii. p. 300, 
note, f. 220, parasitic upon the Apple-tree Bark-louse.” A full account of 
its economy is given ibid, pp. 300-302. 
