218 Ins. 
ORTHOPTERA. 
Kadayi, Heinrich. Beitrag zur Keiintniss der Vorgiinge beim Eier- 
legen der Blatta orientalis, Zool. Anz. ii. pp. 632-636. 
Observations on the formation of the egg-capsule within the vulva of 
the ^ , the deposition of the eggs therein (the contents of the right ovary 
are arranged on the left side of the capsule, and vice-versa)^ and the 
mechanism by which the capsule is expelled. 
Newton, E. T. On the Brain of the Cockroach, Blatta orientalis. Q. J. 
Micr. xix. pp. 340-356, pis. xv. & xvi. 
ScuDDER, S. H. Palaeozoic Cockroaches : a Complete Revision of the 
Species of Both Worlds, with an Essay toward their Classification. 
Mem. Bost. So^.*iii. pt. i. No. iii. pp. 1-134, pis. ii.-vi. 
An important memoir, comprising an examination, with original de- 
scriptions (and figures) of all that has been discovered, with historical 
notice and bibliography. About sixty species are described, almost without 
exception known from single specimens, and mostly from one wing only. 
These insects appear to have been very plentiful in the palaaozoic age, 
and their remains gradually become less frequent in ascending the geo- 
logical scale. (Arguing on this evidence, as compared with the number 
of now-existing species, the author indulges in an illusory estimate of the 
number of palaaozoic species.) The old genus Blattina, in which most 
fossil species have been placed, is abandoned for palaaozoic forms, because 
Germar originally used it for a species found in amber, and having no 
connection with those of primitive formations. All the species differ in 
certain neural characters from recent forms. The author, therefore, pro- 
poses a special division for these, which he terms Palceohlattarice, divided 
into two tribes, viz., Mylacridce (containing a few species, all of which 
are from America) and Blattinarice (common both to Europe and America), 
according to neural characters. The Mylacridce were geologically the 
oldest, and therefore the oldest Cockroaches were American. A table of 
species, according to presumed antiquity, is given. An entirely new 
generic arrangement is adopted, asunder ;—Mylacrid^ include 3 genera, 
viz., Mylacris, Scudder (1868), in which are placed Blattina hretonensis, 
Sc., pL V. fig. 1, B. heeri^ Sc., pi. v. fig. 11, M. pennsylvanicum{^cus'\, sp. n., 
p. 44, pi. V. figs. 13 & 14, lower coal-measures of Pennsylvania, M, anthraco- 
2 )hilum[-lus], Sc., pi. v. figs. 6-8, and M. mans/ieldi^ sp. n., p. 47, pi. v. fig. 15, 
lower coal-measures of Pennsylvania ; LithomylacriSy g. n., p. 48, includ- 
ing L. angustumlj-tus^yS^. n., p. 48, pi. v. figs. 2 & 3, upper coal-measures of 
Pennsylvania, L. pittstonianum[^nus']y sp. n., p. 50, from the same, and L. 
simplex, sp. n., p. 51, pi. v. fig. 5, from the upper coal-measures of the same 
State ; Necmylacris, g.n., p. 52, includes N. laocanum\^nus\ sp.n., p.53, pl.v. 
fig. 12, and N. heros, sp. n., p. 54, pi. v. fig. 9, from the lower coal-measures 
of that State. The Blattinariab are thus subdivided; — Etoblattina, 
g. n., p. 56, includes Blattina primceva, Gold., pi. iii. fig. 7, B. labachensis, 
Gold., pi. iii. fig. 5, B. euglyptica, Germ., pis. ii. fig. 16, iv. fig. 7, B. affinis, 
Gold., pi. ii. fig. 2, B. Jlabellata, Germ., pi. ii. fig. 4, B. anthracophila. 
Germ., pi. ii., fig. 1, B. weissigensis, Gein., pi. vi. fig. 5, E. dohrni = B. 
euglyptica, pars, Gold., pi. ii. fig. 5, E. lesquereuxi, sp. n., p. 67, pi. vi. 
