376 
Length. The adult male is rather extended and measures 
"86 mm. 
Locality. Tacuri Pucti, (Alto Paranå, Paraguay), 
July 6. 1900 (Dr. F. Silvestri leg.). 
Remarks. This species is closely allied to P. argentinensis, 
but is easily distinguished by the branches of the anal plate and 
especially by the shape of the styli and the slight difference be- 
tween the length of the two flagella on the lower antennal branch. 
9: ning me n. sp. 
TIT, fig, 4 2a—4 f. 
Material. Only one rather badly preserved adult male. 
Head (fig. 4a). The distance between the eyes is slightly 
longer than the length of an eye. — The hairs in the two an- 
terior rows are proportionately long and besides rather clavate with 
exception of the outer hairs in the second row, which are cylindrical. 
The hairs in the third row are short and clavate; those in the 
fourth row are wanting in my specimen. 
Antennæ (fig. 4a). The longest of the two front hairs on the 
fourth joint is slightly shorter than the three distal joints together 
and much longer than the other. The upper branch is as long as 
the three distal joints of the peduncle and slightly -more than four 
times longer than broad; 'the flagellum is nearly three times longer 
than the branch and 'soméwhat shorter than the breadth… of the 
head. The lower branch measures slightly more than two thirds of 
the upper branch and is twice as long as broad; it widens con- 
siderably from the base towards the anterior flagellum, and its an- 
terior angle is deeply and rather obliquely cut off.… The posterior 
flagellum is four fifths of that on the upper branch and two and.;a 
half times longer than the anterior flagellum, which is very short. 
The flagella. are moderately slender and scarcely thickened towards 
the apex. The globulus is small, its transverse diameter considerably 
shorter than that of the upper branch; the stalk is short. 
Trunk (fig. 4 b). Moderately ; robust. — The fifth pair of 
