78 Alcxiuukr Pdrmikcvitch, 



Family Cryptosiemmidae Westwood. 

 Abdominal tcrgitcs distinctly separate. 



Genus Polyochera Scudder 1884 

 Tarsus of second leg fused with the metatarsus, forming one 

 joint. Genotype P. punctulaia Scudder. 



Key to the Species of Polyochera. 



1. Abdominal tergites of the 4th, 5th and 6th segments each marked 

 with 2 pairs of round impressions. Cucullus nearly as long as 

 wide P. alticeps 



+ abdominal tergites divided into fields b}' 2 or 4 longitudinal 

 lines. Cucullus much wider than long 2 



2. No constriction between cephalothorax and abdomen. Body 

 punctulate. Abdominal tergites of the 4th, 5th and 6th segments 

 each divided into 5 fields by longitudinal lines 



P. punciulata 

 + a distinct constriction between cephalothorax and abdomen. 

 Body smooth. Abdominal tergites, including that of the 3d 

 segment, divided into 3 fields each by 2 parallel longitudinal 

 lines P. glabra 



Polyochera alticeps Pocock 

 P. alticeps Pocock, Carb. Arachn., 1911, p. 40, pi. II, fig. 6 ; 

 text fig. 14, From the Coal Measures of Coseley, near Dudley, 

 England. 



Polyochera punctulata Scudder. 

 Plate Vni, figs. 41, 42 ; text figs. 44, 45 



P. punctulata Scudder, Proc. Amer. Acad. Arts Sci., Vol. XX, 

 1884, p. 16. Id., Mem. Boston Soc. Nat. Hist., Vol. IV, 1890, p. 444, 

 pi. 39, figs. 2, 6. 



The nodule containing the type specimen, No. 1745 of the Lacoe 

 collection, at present No. 37971 of the U. S. National Museum, 

 shows both the obverse and reverse in an excellent state of pre- 

 servation. The description of Scudder not being quite correct, the 

 following should be substituted for it. 



Total length 15.5 mm. Cucullus i.o mm. long, ^.8 mm. wide. 

 Cephalothorax 4.7 mm. long, 5.5 mm. wide at posterior edge wliich 

 is procurved. Abdomen rounded behind ; only the third to sixth 

 tergites visible, the segments composing the " tail " missing. The 

 tergite of the third abdominal segment, the one adjoining the cephalo- 

 thorax, is the shortest ; the tergite of the sixth, or last visible seg- 



