' 
397 
Length. The adult and moderately extended måle measures 
"72 mm. 
Variation. An adult specimen from Denmark is "69 mm. long: 
of two adult specimens from Germany one is a little shorter, while 
the other, which is somewhat contracted, only measures "55 mm. 
As to the characteristic anal plate (with its two branches from 
the posterior angles as long as the plate and considerably diverging, 
while two other branches are rudimentary and placed rather distant 
from each other) and in the structure of the third pair of tactile 
setæ thesé specimens agree rather well with the specimen described 
above, but especially in the German specimens the tactile setæ of 
the last pair are somewhat shorter, and in one of the specimens 
with the eyes distinct enough for observation these areas are con- 
spicuously longer and more approximate to each other than in the 
specimen figured on pl. V. Nevertheless, these specimens must be 
considered as belonging to the "same: species. 
Locality.. One specimen was captured (by the author) in a 
wood of 'olive trees: åt Palmi, Calabria, May 17. 1893. A 
specimen has been secured (by the author) in the Danish Island 
of Møen, another at Hellebæk near Elsinore, Sealand (Dr. 
Th. Mortensen):. Mr. C. Bårner has taken some specimens at Mar- 
burg (Hesse, Germany). 
Bemarks. The species is very closely allied to P. vulgaris, 
but it is easily and sharply distinguished by the anal plate and 
the third pair of tactile setæ; furthermore it is smaller than al- 
most: all specimens of P. vulgaris. I did not find any specimen 
presenting a transition or conneeting link between P. vulgaris and 
P, gracilis in the two" essential characters mentioned, and I must 
therefore consider them as two distinct species. 
18. une pygmæus 1. sp. 
gz.. 4a—4 e. 
Material. Two adult specimens, male and female, have been 
examined; both were rather well preserved. 
ie 
