6 Arachn, 
ABACHNIDA (l878). 
contain not only descriptions of 7 species and a new genus found in other 
countries, but several other species, included in the fauna of France on 
the authority of Thorell. All are reckoned in the above summary. 
Taczanowski, L. Les Aran^ides du Perou, Fam. Attides. Bull. Mosc. 
liii. pp. 278-374, pi. iv. 
Describes and records 68 species (57 new) of Salticidce, fron Northern 
and Central Peru, belonging to 13 genera (one new). 
. Les Aran^ides du Pdrou Central. Hor. Ent. Ross. xiv. pp. 140- 
175, pis. i. & ii. 
Describes 27 species (21 new) of Epeiridce. 
Thorell, T. Notice of the Spiders of the ‘Polaris’ Expedition. Am. 
Nat. xii. pp. 393-396. 
Collates the results of former works by O. Fabricius, L. Koch, T. Thorell, 
and 0. P. Cambridge on Greenland Spiders, which now number 25 species ; 
only 19 however being tolerably well known. Those found during the 
‘ Polaris ’ Expedition were four only. 
. Studi sui Ragni Males! e Papuan!. Part ii. Ragni di Amboina 
raccolti dal Prof. 0. Beccari. Ann. Mus. Genov, xiii. pp. 1-317 [^cf- 
Zool. Rec. xiv. Arachn. p. 6]. 
Characterizes 7 new genera of several families, and describes 100 
species, of which 40, of various families and genera, are given as new. 
J. Barrois (J. Anat. Phys. xiv. pp. 529-547, pi. xxxiv.) has contri- 
buted an interesting and valuable paper on the development of spiders. 
Those upon which his researches have been made are (among others not 
named) Tegenaria domestlca^ some species of Lycosa, and Epeira dia- 
demata. The result is to modify some of the views hitherto admitted in 
respect to external development. (The completely segmented form of 
the caput, thorax, and abdomen is well shown, figs. 1 & 2.) 
L. Becker, OR. Ent. Belg. xxi. pp. cxxvii.-cxxxii., details experiments 
very similar to those long ago recorded by Blackwall (Tr. L. S. xv. 
pp. 449-459), and shows how Spiders can emit a line which is carried by 
the current of air and fixes itself to any object on which it impinges, 
and thus enables it to cross intervening spaces. The author comes how- 
ever to the conclusion that a current of air, though of great assistance, is 
not absolutely needed ; the Spider being able to emit a line which will 
rise of itself and sail away to an opposite point. 
H. C. McCook (P. Ac. Philad. 1878, pp. 337-339, records observations 
on the aeronautic flight of spiders {Lycosidce and Salticidce). The general 
results are given with great clearness, and are similar to those arrived at 
by other observers on this subject. 
The same author (/. c. pp. 124-135) has a paper on “ The Basilica 
Spider and her snare,” with woodcut figures of snares and spiders. The 
species described are of the genera Epeira {Meta) and Linyphia. [The 
fact of the two distinct types of snare (geometric and irregular) being 
here recorded as spun by the same spider is very interesting, and tends 
