EXPLANATION OF PLATES. 



Plate I. 



1. Theridium diffe7-e7is^ doTsa,\ markings oi female x 8; la, male x 8; 16, male pal- 

 pus; T, the tube; x, soft terminal appendage; y. hard roughened corner of the palpal 

 organ ; Ic. epigynum, outer side, showing no openings ; \d, epigynum made transparent, 

 showing the openings a; a; on the under side, the spermatlnjcag s s, the long tubes y y 

 leading to the outer openings, and the short tubes leading to the oviduct. 



2. Theridium sjnrale, dorsal markings of female x 8 ; 2a, dorsal markings of male 

 X 8 ; 26, male palpus : T, the long tube ; 2c, epigynum, showing the openings outside ; 

 2d, epigynum made transparent, showing the spermathecse s s, the long tubes y y, and 

 the short tubes z z. 



3. Theridium montanum, dorsal markings of female x 8 ; ?,a, dorsal markings of 

 male x 8; 36, male palpus, the hard toothed appendage of the palpal organ at the 

 right; 3c, epigynum, showing the single hole in the middle and a hard depression each 

 side. 



4. Theridium zelotyimm, dorsal markings of female X 8 ; 4rt, epigynum with a single 

 opening and short tubes to the spermathecas. 



5. Theridium murariufrt, dorsal markings of female x 8; 5a, male palpus; T. tlie 

 tube. At the left of the tube is a hard tooth. 



6. Theridium pundo-sparsum, dorsal markings of female x 8 ; 6«, epigynum witli 

 a single opening partly divided at the hind edge. 



Pl.ite ir. 



1. Theridium fej'nVZarw'j^m C. Koch, abdomen of fennale x 8; Ir/,- male palpus ; 16, 

 epigynum with a single opening partly divided at the forward edge. 



2. Theridium ruincola, ahdomen oi ^QvaRlQ x 8; 2a, male palpus ; 26, epigynum from 

 below, showing a single opening covered by a horny ridge; 2c, epigynum from the 

 right side. 



3. Theridium globosum Tlentz, side of female x 8. 



4. Theridium unimaculatum, side of female x 8; 4a, male palpus; 46, epigynum, 

 showing a single opening near the edge, and the internal parts indistinctly through the 

 skin. 



5. Theridium seximnctatum, dorsal markings of female x 8 ; 5a, mandibles of male ; 

 56, male palpus; 5c, epigynum with a single large opening, through wliicli the openings 

 of the two tubes show indistinctly. 



Plate III. 



1. TJieridium frondeum llentz, \a to 1/, dorsal markings of females x 4; \ I, , ccpha- 

 lothorax of male x 8, showing form of head and mandibles ; Ij/, male palpus ; 17i, epigy- 

 num, showing the single opening directed forward. 



2 and 2a. Theridium lineatum, dorsal and venlr:il markings of fciiiale x 4. 



3. Mimetm interfectur Wmt-A, iewvAk' x 1; :!a, licad; :16, epigynum. 



