J. H. Emerton — N'eu^ England Therididce. 83 



8. Erigone autumnalis, side of cephalothorax of male; 8a, mandibles, maxillfe, and 

 sternum of male ; 86, palpus of male ; 8c, epigynum. 



9. Erigone longipalpis, side of male ; 9a, palpus of male, showing palpal organ ; 96, 

 epigynum ; 9c, mandible and maxilla of female ; 9rf, mandible and maxilla of male. 



10. Erigone longipalins, male of another variety ; 10c, palpus of same ; 10a, cephalo- 

 thorax from above ; 1 Oa. palpus of another male from Danvers, Mass. 



Plate XVI II. 



1. Linyplda viarginata, dovnal markings of female x 8; la, head of female from 

 above; lb, front of head and mandibles of female; Ic, top of head of male; Id, front of 

 head and mandibles of male; le, maxilte of female; 1/, epigynum ; 1 (7. male palpus ; 

 Ih, end of palpal organ, showing the tube T, the large twisted appendage and two soft 

 appendages ; ]j, the tarsal hook. 



2. Linypliia communis, dorsal markings of female x 8 ; 2a, side of male ; 26, front 

 of head and mandibles of male ; 2c, front of head and mandibles of female ; 2c?, 2e, 

 male palpus ; 2/, epigynum. 



3. Linyphia dafhrata, markings of abdomen; 3a, fiont of head and mandibles of 

 female ; 36, male palpus; 3c, largest appendage of palpal organ ; 3d, epigynum. 



Plate XIX. 



1. LinypJiia 2jJirygiana,(\orsii\ markings oi abdomen x 8; la, head of male ; 16, head 

 of female ; Ic, mandible of female ; Irf, mandible of male ; If, male palpus; 1/, palpal 

 organ; 1^, tarsal hook ; 1/i, epigynum. 



2. Linyphia mandibulata, dorsal markings of female ; 2a, front of mandibles of male ; 

 26, side of cephalothorax of male ; 2c, epigynum; 2d, male palpus; H, the tarsal hook. 



Plate XX. 



1. Stemonyp)liantes trilineata, dorsal markings of abdomen; la, mandible of female; 

 16, Ic, male palpus: \d, epigynum. 



2. Diplostyla nigrina, dorsal markings of abdomen ; 2a, male palpus ; H, tarsal hook ; 

 T, end of tube of the palpal organ ; 26, palpal organ ; T, the tube with soft appendages 

 inside the coil ; a. 6, hard .supporting appendages; H, the tarsal hook; 2c, epigynum 

 from ventral side ; c, c, openings ; 2d, same from the side ; a, outer, and 6, inner soft 

 appendages. 



3. Diplostyla concolor, male palpus; t, the tube; 3a, male palpus from the side; T, 

 the tube ; H, tarsal hook ; 36, side of epigynum ; a, 6, soft appendages ; 3c, epigynum 

 from ventral side ; a, outer soft appendage ; , c, c, openings. 



• Plate XXI. 



1. Diplostyla canadensis, male palpus. 



2. Drapeiisca socialis, dorsal markings of abdomen x 8 ; 2a, front of head, mandibles, 

 and palpi of female ; 26, epigynum ; 2c, base of tarsus, showing at the left a curved 

 process, and at the right the tarsal hook h. 



3. Helopilwra pallescens, male palpus; 3", tibia and tar.sal hook ; 36, epigynum. 



4. Bathyphantes minula, male palpus ; h, the tarsal hook ; x, roughened corner of 

 tarsus; -16, epigynum from ventral side; 4c, side of epigynum partly unfolded. 



