88 Ins . 
INSECTA. 
367. [Konow, F. W.] Die europaischen Blcnnocampen (soweit dieselben 
bisher bekannt sind). T. c. p. 183, 211, 243, 267. [ Hymenopterci .] 
The genera are tabulated and described, 13 — 6 of them new — being 
recognized. The species are discriminated by tables. 
368. — -. Description d’une esp&ce nouvello de Tenthrede. Rev. d’Ent. 
v, p. 137. [ Ilymenoptera .] 
369. Korschelt, E. Ueber die Entstehung und Bedeutung der ver- 
schiedeuen Zellen-elemente des Insektenovariums. Z. wiss. Zool. 
xliii, pp. 537-720, pis. xx-xxiv. 
This gives a large amount of information about the growth and 
development of the various kinds of cells found in the ovaries of Insects. 
He commences with a sketch of the three principal kinds of these organs, 
and then passes to a historical review of the subject, dealing specially 
with the terminal threads and the terminal chamber. In a second part 
he details his own observations made on 14 species of Insects of several 
orders, discussing very fully — under Notonecta glauca — Will’s observations 
and conclusions. In part m he generalises his observations, and com- 
pares them with those of others. Discusses also tlio numerous differences 
in the earlier stages of the various cell-elements, and whether they can 
bo reduced to a common type, as also the bearing of his observations on 
Weismanu’s theory of the continuity of the germ plasma ; then passos to 
the similarity in the formation of the egg in Insects-and in Daphnidce. 
IV. Treats of the importance of the terminal thread and terminal chamber 
in the formation of the various cell-elements, v. The morphological 
importance of the various cell-elements of the ovarian tubes, vi. Critical 
remarks on previous investigations, concluding with a summary of 
his results under twelve heads, the first being that the different cell- 
elements of the egg-tubes, eggs, nutrient cells, and epithelium arise out 
of homologous neutral elements, which are to be looked for in the con- 
tents of the egg-tube at its earliest foundation. [Brief summary, J. R. 
Micr. Soc. (2) vi, p. 782, and 1887, pp. 71 & 72.] 
370. . Ein weiterer Beitrag zur Losung der Frage nach dem Urs- 
prung der verschiedenen Zellenelemente der Insectenovarien. Zool. 
Anz. ix. pp. 256-263. 
A continuation of the discussion between the writer, Will, and Wiolo- 
wiejski \_cf. Zool. Rec. xxii, Ins. (172)] of some obscure points in the 
earlier stages of the formation of the egg in the ovary. 
371. Kowalevsky, A. Zur embryonalen Entwiclduug der Musciden. 
Biol. Centralbl. vi, pp. 49-54. [For summary, vide J. R. Micr. Soc. 
(2) vi, pp. 429 & 430.] 
372. . Zum Yerhalteu des Ruckengefasses • und des guirlanden- 
formigen Zellenstrangs der Musciden wahrend der Metamorphose. 
T. c. pp. 74-79. 
He finds that the middle portion of the heart and the surrounding 
masses of cells persist from the youngest larva to the imago, and that 
its function is in a certain degree uninterrupted. For summary, vide 
J. R. Micr. Soc. (2) vi, pp. 593 & 594.] 
