ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 175 



■degree of isolation, great drought, great heat, and sparse vegetation. 

 Colour-resemblance between the exposed parts and the immediate 

 environment is abundantly illustrated. But some forms (JEdaleus nigro- 

 Jasciatus De Geer and (E. senegaJensis Krss.) seem to be protected by a 

 strongly-swelling secretion from a glandular vesicle beneath the pro- 

 notuni, — a clear drop is exuded and can be re-absorbed. In others, e.g. 

 Eugaster guyoni Serv., there is a blood-spraying apparatus at the junction 

 membrane between coxa and trochanter on all the legs. 



In another communication* on the Orthoptera of Algiers and Tunis, 

 Prof. Yosseler discusses (1) the relations of these to the Mediterranean- 

 palasarctic-Orthoptera ; (2) the markings and other adaptations of the 

 Acridiidse ; (3) the moulting of Eugaster and other forms, with especial 

 reference to coloration ; (4) the spermatophores of Eugaster and Platy- 

 stolus ; (5) the blood-spraying of various Locustidae ; and (6) the 

 malodorous glands of CEdaleus. The particularly successful illustrations 

 of this paper are being sold separately, — a useful new departure. 



Sensory Hairs on Pupa of Papilio podalirius.t — M. Grafin von 

 Linden finds projecting from various parts of the chitinous pupal sheath 

 minute hairs ; the base is connected by a fine nerve running through the 

 ■chitin to a peripheral nerve-strand which lies between the pupal sheath 

 and the epithelium covering the body. Internal to the epithelium there 

 are more nerve-strands. The peripheral nerve-terminations outside the 

 body are brought into connection with the outer world by the fine fibres 

 running through the chitin to the projecting hairs. Perhaps the func- 

 tion is concerned with temperature. Perhaps the structures are genetically 

 •connected with sensory structures in the caterpillar stage. 



Appendicular Nature of Abdominal Styles. £ — B. Wandolleck 

 refers to the embryological evidence of Heymons that styles and cerci 

 have an appendicular nature, and that the gonapophyses have not, and 

 to Verhoeff's objection that the styles are always unjointed. In fact, 

 Verhoeff was inclined to attribute a homology with limbs to the gonapo- 

 physes, but not to the styles. 



Wandolleck describes and figures the styles of a female specimen of 

 Lagria hirta, which have two joints. The same is true in Omophlus 

 lepturoides. Thus Verhoeff's objection is answered. 



Trochanter and Prssfemuri — K. W. Yerhoeff maintains that the 

 trochanter of Chilopoda is not homologous with what is so called in 

 insects, that it is the equivalent of an overlooked joint in insects, dis- 

 tinct in some lower forms, more and more degenerate in higher forms, — 

 a joint which should be called the prasfemur. A true trochanter has 

 two characteristics : (1) that it lies between two joints which are always 

 larger than itself, and has always the coxa to its basal side ; and (2) that 

 it is without intrinsic musculature. 



Studies on the History of the Germ-Cells in Lepidoptera.[j — 

 K. Griinberg first discusses the apical cell or Yerson's cell which occurs at 



* Zool. Jahrb., xvii. (1902) pp. 1-98 (3 pis. and 5 fies.). 



t Verh. Deutsch. Zool. Ges., xii. Vers. (1902) pp. 126-33 (7 figs.). 



\ Tom. cit., pp. 193-5 (2 figs.). 



§ Zool. Anzeig., xxvi. (1902) pp. 205-14 (10 figs.). 



I Tom. cit., pp. 131-42 (4 tigs.). 



