ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 43 



the nervous system, and possibly of the heart. On the other hand, re- 

 generation occurs chiefly in regard to those organs in which the larval 

 type differs from the adult. 



Mimicry of a Moss by a Larva and Pupa.* . Mliggenburg points 



out the remarkable resemblance to a moss presented by the larva and 

 pupa of a gnat, Cylindrotoma glabrata. The eggs are laid in August in 

 the axils of the leaves of the moss, Hypnum (ITylocomiuvi) squamosum. 

 The larva) soon emerge, and remain very small through the winter ; 

 they are of a moss-green colour, and are furnished, especially on the 

 back, with curved spines which closely resemble the leaves of the moss ; 

 while dark patches on the upper side of the body recall dead plant- 

 remains and patches of shade. They are about 2 cm. in length. They 

 feed on the moss, and change, in the summer, into the very similar 

 pupa ; the imago emerging in a very few days. 



Genus Termitoxenia.j — E. Wasmann adds some further notes to his 

 prevous J description of this interesting Dipteron from the nests of 

 Termites. He now finds that the genus must be regarded as the type 

 of a new family, to which he gives the name of Termitoxeniidse, and 

 which must be regarded as standing between tho Eumyidaa and the 

 Pupipara. Some of the most striking differences from the Eumyidoe 

 are that the frontal cleft (Stirnspalte) lies in front of instead of be- 

 hind the origin of the antenca3, the ovaries consist at each side of only 

 a single tube, and finally, owing to the suppression of the larval and 

 pupal stages, the Terniitoxeniidse have become ametabolic. In Termi- 

 toxenia s. str., tho stenogastric imago emerges direct from the very 

 large eggs, while in the sub-genus Termitomyia the development appa- 

 rently takes place within the body of the mother, from which the steno- 

 gastric imago emerges. This imago possesses certain larval characters, 

 and gradually develops into the physogastric adult. The four known 

 species are protandrous hermaphrodites, and, as indicated above, the one 

 sub-genus is oviparous and the other viviparous. 



Spermatocytic Kineses in Orthoptera. § — E. do Sinety has studied 

 the spermatogenesis in many Orthoptera, and confirms some of the re- 

 sults of McClung. It is necessary, however, to admit that there is a 

 double longitudinal division of the chromosomes. The author has also 

 found the " accessory chromosome " (" small chromosome " of Paulmier, 

 " chromosome x " of Montgomery), whose behaviour is, to say the least, 

 peculiar. 



Copulatory Apparatus of Male Trichoptera.|j — Dr. Enoch Zander 

 has studied the genital armour of these insects as a continuation of his 

 previous work on Hymenoptera. He finds that though the mature in- 

 sects of the two orders appear to be markedly contrasted as regards tho 

 organs in question, yet these are in both cases developed from morpho- 

 genetically equivalent rudiments. In both cases a genital pocket is 

 developed near the post-segmental border of the twelfth sternum. At 

 the base of this pocket a pair of projections appear which develop into 



* Arch. Naturgesch., 1901. Beih., pp. 169-86 (1 pi.). See Hedwigia, xl. (1901) 

 Beibl., p. 133. f Zeitsclir. wiss. Zool., lxx. (1901) pp. 289-9S. 



% Cf. this Journal, 1901, p. 33. § Comptes Rendus, exxxiii. (1901) pp. 824-G. 

 || Zeitschr. wiss. Zool., lxx. (1901) pp. 192-235 (1 pi. and 21 figs.). 



