534 
ZOOLOGICAL LITERATURE. 
der deiitschen Arten. Zeitscljr. fur die gesammten Natur- 
wiss. 1865, pp. 1-142. 
This paper contains an elaborate revision of the group of 
genera formed at the expense of Gravenhorst^s genus Cryptus, 
constituting a subfamily of Ichneumonidce, 
VoLLENHOvEN, S. C. Snellen VAN. Dc inlandschc Bladwespen, 
in hare gedaantevcrwisselingen en Icvenswijze besehreven. 
Elfde Stuk. Tijdsch. Entom. 1865, pp. 73-93, pis. 3-6. 
WiNCHELL, A. Notes on Selandria cerasi (Harris) as it occurs 
at Anri Arbor, Michigan. Proc. Boston Soc. Nat. Hist. 
vqI. ix. pp. 321-325 : February 1865. 
* t Anatomical and Physiological. 
Leuckart, R. Ueber Bienenzwitter. [On Hermaphrodite Bees.] 
Amtl. Bericht der 39®*^®“ Versammlung deutsch. Naturf. 
&c. in Giessen, September 1864, pp. 173-175 : 1865. 
Reinhard, H. Zur Entwickelungsgeschichte des Tracheen- 
systems der Hymenopteren mit besonderer Beziehung auf 
dessen morpliologische Bedeutung. [On the developmen- 
tal history of the Tracheary System of the Hymenoptera, 
with especial reference to its morphological significance.] 
Berlin, entom. Zeitschr. 1865, pp. 187-218, Taf. i. & ii. 
The author has made a series of careful researches upon the 
structure and arrangement of the respiratory organs in various 
Hymenoptera, chiefly belonging to the groups Cynipulce and 
Chalcididce. The larvae were examined after being rendered 
transparent by means of a mixture of gelatine and glycerine, 
which leaves the tracheae visible for some time in consequence 
of its penetration into them being resisted by the contained air. 
He describes the structure of the tracheary system in these little 
larvae and the changes which they undergo during transforma- 
tion, and indicates the differences presented by it as compared 
with that of the larvae of other forms of Hymenoptera. From 
these details the author proceeds to certain morphological con- 
siderations, especially with regard to the disputed natm*e of the 
hinder part of the thorax in the perfect Hymenoptera. From 
his examination of the structure he comes to the conclusion that 
the thorax in the Hymenoptera consists of four segments. 
General remarks upon the Order. 
Cresson has published (Proc. Ent. Soc. Phil. vol. iv. pp. 242- 
313 & pp. 426-488) the greater part of a systematic catalogue 
of the Hymenoptera from the Colorado territory in the Rocky 
Mountains, contained in the collection of the Entomological 
Society of Philadelphia. The specimens were chiefly collected in 
