Studie o Coccidech. 23 



are 3— 8 parastigmatical spinnerets (Tab. 2. fig. 12 b.); spimierets of 

 the samé sbape are dispersecl without any orcler on the whole sur- 

 face of tbe body, but especially on the abdomen. Here we see also 

 some short hairs and some simple ducts. Anal apertuře is elliptical 

 with a thickened margin, on which are 2 stout hairs anteriorly and 

 posteriorly. and on each side 3 strong spineshaped hairs (Tab. 2. 

 fig. 6.). 



The first larva is elliptical, reddish-yellow. Head with some 

 hairs on periphery; eyes distinct, reddish-brown, antennae (fig. 9) 5 

 jointed; the largest basal joint equal in length with the 5*'', which 

 is after the 2"^ the longest; 3''^^ and 4"^ equal in length, both the 

 shortest; there are on each joint two little hairs, on the last two short 

 obtuse and two long, fine ones. Mentum, dimerous with some hairs. 



Legs (Tab. 2. fig. 10.) strong, coxa large, trochanter wedge 

 shaped, with a rather long hair ; femur massive, as long as tibia and 

 tarsus together; two pairs of digitules on the tarsus; proximally 

 from the inferior pair is a hair in an incision, distally is the leg 

 terminated by a simple untoothed claw of the samé length as the 

 tarsus. 



Abdomen distinctly segmentated; it bears on the side of each 

 segment 2 hairs ; two pairs of anal tubercles, with strong conical spines 

 on the apex ; on the base of each single inferior tubercle (therefore ven- 

 trally) is one long bristle-shaped hair and inwardly from it a little 

 simple hair. 



The anal opening oval with one superior and one inferior pair 

 of hairs (Tab. 2. fig. 11). 



Length of the adult female : 0'47 mm ; breadth : 0*44 mm. Male 

 unknown. 



It forms white feltshaped spreads in cracks of the beech- 

 tree bark. 



Bohemia on several lacalities, on Fagus silvatica. 



The systematic position is in the subfm. Coccidinae, next the 

 degenerated genera as Xylococcus Loew, CapuUma Signorbt, Sphaero- 

 coccus Maskell etc. 



Institute for Comp. Anat. and Zoology, 



Bohemian University, Prague. Karlovo 



náměstí. 21. Bohemia. 



Literatura. 



1. Signoret: Essai sur les Cochenilles. 



2. Comstock: Report on Scale Insects 1881. 



