272 SUMMAEY OF CURRENT RESEARCHES RELATING TO 



tegmina are small and its wings vestigial, so that it is obviously in- 

 capable of flight. But the tegmina presumably function as a protection 

 to the body, for they are sufficiently developed to show that the venation 

 is practically identical with that of the male. The total length is 

 2 • 5 mm. ; the colour dull yellowish. J. A. T. 



Prothoracic Endoskeleton of Mole-cricket.— P. Carpentier {Bull. 

 Classe lies /Sciences, Acad. Roy. Belgique, 1921, 7, 125-81:). A careful 

 description of the prothoracic endoskeleton of this burrowing insect. 

 Although it is extraordinarily specialized it is not aberrant. The space 

 between the right and left pleural lamellas is much reduced by the new 

 formation of another space between each lamella and the reflected 

 external margin of the notum. This interpleural space contains the 

 relatively feeble muscles which draw the limb inwards ; the extrapleural 

 space contains the enormous muscle which forces the limb outwards in 

 burrowing. The other peculiarities are interpreted as adaptive to the 

 underground habits. J. A. T. 



"■b' 



Jura Protura. — E. Handschin {ML Schweiz. Entomol. Ges., 1920, 

 13, si-7). A description of Acerentulus tiarneus Berl., which Berlese 

 found in 1910 in the Trentino at a height of 1500 m., and Eosentomon 

 rihagai Berl., which Berlese found in 1909 in the same place. Both 

 were found by Handschin in moss from Jouxtal in the Jura, and their 

 special interest is in their geographical distribution, for the record links 

 together previously reported habitats. J. A. T. 



/3. Onychophora. 



Salivary Glands of Opisthopatus cinctipes. — 0. Duboscq {Arch. 

 Zool. Exper., 1920, 59, Notes et Revue, No. ?., 07-74, 4 figs.). In the 

 adult the glands have the structure of a differentiated nephridium, 

 showing a coelomic vesicle, a funnel, a descending portion with mucous 

 cells, and an ascending portion with ferment-cells. These two portions 

 are united by a common canal, forming a deep branch. The secretion 

 of the ferment-cells is like that of a mammary gland. The same is 

 true of the mucous cells, but the secretion is less active and the 

 " decapitation " of the secretion is less brusque. At the level of the 

 common canal there are blood-corpuscles along with the mucous and 

 albuminoid secretions, and these corpuscles have • doubtless some 

 diastatic role. In lactation there are leucocytes mixed with the 

 mammary secretion, especially in the colostrum. J. A. T. 



PapillsB and Ventral Cerebral Organ in Onychophora. — 0. 

 Duboscq {Arch. Zool. Exper., 1920, 59, Notes et Revue, No. 2, 21-7, 

 6 figs.). The primordium of a tactile corpuscle in embryos of Opistho- 

 patus cinctipes consists of a little group of epithelial nuclei. Above this 

 the cuticle thickens into a disc, which becomes concave, and then 

 button-like. This becomes a tube with an axial perforation. The 

 nuclei at the base multiply and form a group of twenty or so at the 

 base of the cuticular projection. Below the brain there are two vesicles, 



