424 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
has found on oats ( G ’ avense sp. n.) does not develop on wheat. They 
are distinct species, with the following differences : — 
Larva, (a) G. destructor. Sternal spatula bifurcated ; anal segment 
ending in a bilobed dorsal prolongation, whose lobes bear dorsal papillae 
in fours, (b) C. avense. Dorsal spatula ending in a spear-shaped point ; 
anal segment without bilobed prolongation, dorsal papillae implanted 
directly on the segment. 
Adult, (a) G. destructor. Last joint of the palp of almost uniform 
diameter throughout its length ; sides of the abdomen with white greyish 
hairs, (b) G. avense. Last joint of the palp much narrowed in its 
apical third ; white greyish hairs forming a band on each side of the 
abdomen. 
The author notes that this new pest has been checked by the parasitic 
larvae of Plcitygaster and other Chalcididae which destroy the young 
Cecidomyia. 
Lachninse.* — Herr A. Mordwilko completes a summary of his in- 
vestigations on Tree-lice (Lachninae), and gives a diagnostic table of the 
species of Lachnus which he has found on Conifers: — L. grossus Kalt., 
L. Bogdanowi sp. n., L. pinihabitans sp. n., L.pini Kalt., L. picese Walk., 
L. nudus De Geer, L. tseniatus Koch, L. jpinicola Kalt., L. pineus Mord., 
L. pineus var. curtipilosa Mord., L. pineus var. Tiyperophila Koch, L.juniperi 
De Geer, L.flavus sp. n., L. juniper inus sp. n., L. fasciatus Kalt., L. pichtse 
sp. n., L. pineti Fab., and L. agilis Kalt. 
S. Arachnida. 
New Human Parasite.j — Dr. H. Miyake and Prof. J. Scriba describe 
under the name of Nephroages sanguinarius a new parasite from the 
urino-genital apparatus of man. They point out that Sarcoptids have 
very rarely been found in any deeper layers than the skin. A Japanese 
peasant, aged 37, was brought into the hospital, suffering from haematuria 
of a year’s duration. The urine was found to contain the mites, which 
ceased to appear in it after an operation on the kidneys. Nephroages 
exhibits considerable differences in the size of the two sexes, the males 
having an average length of 117 p and a breadth of 79 p. The females 
varied between a length of 200 and 360 p and a breadth of 80 to 120 p. 
The parasite has four well-developed pairs of legs, all with five joints of 
equal size. Although the authors have no doubt that the investment of 
the body consisted of chitin it showed the remarkable peculiarity that 
it completely disappeared when imbedded in Canada balsam. In direct- 
ing the attention of their fellow workers to this new parasite, the authors 
express the hope that those who have patients suffering from fibrinuria 
in tropical and subtropical countries will look for the presence of this 
parasite. 
e. Crustacea. 
Locomotor Apparatus and Movements of Crayfish.! — Dr. Th. List 
begins his study with a description of the articulations of the walking- 
legs in Astacus fluviatilis. The joints are all uniaxial (Scharniergelenhe ) . 
* Zool. Anzeig., xviii. (1895) pp. 93-104. 
f Mitth. Med. Facultat. K. Japan. Univ., iii. (1894) pp. 1-10 (2 pis.). 
X Morphol. Jahrb., xxii. (1895) pp. 380-440 (5 pis., 3 figs.). 
