322 PROCEEDINGS OF THE ACADEMY OF [March, 



Montgomery, T. H., Jr. 1902. Descriptions of Lycosidse and Oxyopidfc of 

 Philadelphia and Its Vicinity. Proc. Acad. Nat. Sci. Phila. 



1903. Supplementary Notes on Spiders of the Genera Lycosa, Pardosa, 



Pirata and Dolomedes from the Northeastern United States. Ibid. 



ScuDDER, S. H, 1877. The Tube-constructing Ground Spider of Nantucket. 



Psyche, 2. 

 Simon, E. 1876. Les Arachnides de France, 3, Paris. 



1888. Ann. Soc. Entom. France. 



1898a. Histoire naturelle des Araignees, 2 ed., 2, Paris. 



18986. Descriptions d' Arachnides nouveaux des families des Agalenidrc, 



Pisauridae, Lycosidse et Oxyopidac. Ann. Soc. Enfom. Belgique, 42. 



Stone, W. 1890. Pennsylvania and New Jersey Spiders of the Family Ly- 

 cosidse. Proc. Acad. Nat. Sci. Phila. 



Thorell, T. 1872. Om nagra Arachnider fram Gronland. Ofvcrs. Vet.-Aknd. 

 Forhandl. Stockholm, 29. 



1875. Notice of Some Spiders from Labrador. Proc. Bo.^ton Soc. Nat. 



Hist.. 17. 



1877. Descriptions of the Aranc» Collected in Colorado, etc. BuU. U. S. 



Geol. Survey of the Territories, 3. 



Walckenaer, M. 1837. Histoire naturelle des Insectes, Apteres. Suites a 

 Buffon, Paris. 



Explanation of Plates XVIII, XIX, XX. 



All the figures have been drawn by me with the aid of the camera lucida, but the 



degree of magnification varies for the different figures. All the drawings 



of the palpal organs were made from the right-hand palpus. 



Plate XVIII, Fig. 1. — Jjycosa euepigynata, r^, type, palpal organ. 

 Fig. 2. — Idem, 9 , type, epigynum. 

 Fig. 3. — Lycosa insopita, (^, type, palpal organ. 

 Fig. 4. — Idem, 9 , type, epigynum. 

 Fig. 5. — Lycosa antelucana, (^, type, palpal organ. 

 Fig. 6. — Idem, 9 , type, epigynum. 

 Fig. 7. — Lycosa pictilis, (^ , palpal organ. 

 Fig. 8. — Idem. 9 , epigynum. 



Fig. 9. — Trochosa noctuabunda, (^, t\-pe, palpal organ. 

 Fig. 10. — Idem, 9, type, epigynum. 

 Fig. 11. — Lycosa mccooki, 9, co-type, epigynum. 

 Fig. 12. — Trochosa avara, c^, palpal organ. 

 Fig. 13. — Geolycosa texana, (^, palpal organ. 

 Fig. 14. — Idem, 9 , type, epigynum. 



Plate XIX, Fig. 15. — Geolycosa latifrons, (^, tj-pe, palpal organ 

 Fig. 16. — Idem, 9, type, epigynum. 

 Fig. 17. — Idem, 9 , dorsal view of cephalothorax. 

 Fig. 18. — Idem, 9 , lateral view of cephalothorax. 

 Fig. 19. — Geolycosa baltimoriana, (^, palpal organ. 

 Fig. 20. — Pardosa mercurialis, (^, type, palpal organ. 

 Fig. 21. — Idem, 9, type, epigynum. 

 Fig. 22. — Pardosa pauxilla, ^, type, palpal organ. 

 Fig. 23. — Idem. 9, type, epigynum. 

 Fig. 24. — Pardosa lapidicina, (J^, palpal organ. 

 Fig. 25. — Pardosa glacialis, 9, epigynum. 

 Fig. 26. — Pardosa glacialis, 9 , epigynum. 

 Fig. 26. — Pardosa tachypoda, 9 , epigynum. 

 Fig. 27. — Pirata marxi, 9, from Massachusetts, epigynum. 

 Fig. 28. — Pirata sedentarius, (^, type, palpal organ. 

 Fig. 29. — Idem, 9 , type, epigj^num. 



