260 ON THE SPIDERS OF THE GENUS LATRODECTUS. [Apr. 15, 



were kindly sent by M. Simon under this name, I am quite un- 

 able, at present, to separate from tredecim-guttatus. Simon thinks 

 (Ai'achn. France, vol. v.) that this form may be identical with 

 pallidus 0. P. Cambridge. 



Hah. Greece {C. L. Koch) ; Algeria, Spain, and Senegal {Simon) ; 

 Spain, Torrevieja (Thorell) ; Shoa and Tunis {Favesi). 



Latrodectus spinipes Lvicas, 1845. 



Hist. d'Algerie, p. 233, pi. 14. &g. 9. Ilab. Algeria (Lucas). — 

 This is possibly either an Asagena or a Poecilochroa (Drassidse). 



Latrodectus thoracicus Mcolet, 1854. 



Gay's Histoire de Chile, p. 461. Hah. Chili (iVtcoZe^).— Probably 

 a variety of L. mactans (Fabr.). 



Latrodectus tredecim-guttatus (Rossi), 1790. 



Favina Etrusca, vol. ii. p. 136, tab. ix. fig. 10. 



This species is the common Mediterranean form of which L. 

 erebus Walck. is the dai-k unicolorous black variety. 



Hah. Italy, Corsica, Sardinia, Spain, IST. Africa, Greece, S. Russia, 

 Madeira, etc., etc. 



Latrodectus tropicus Yan Hasselt, 1860. 



Tijdschrift voor Entomologie, iii. p. 46, pi. 5. Hah. CuraQoa. — 

 Probably a small variety of L. geographicus Hasselt. 



Latrodectus variegatus Mcolet, 1854. 



Gay's Histoire de Chile, p. 461, pi. 4. fig. 9. Hah. Chili.— 

 Probably a variety of L. mactans Fabr. 



Latrodectus variolus Walck., 1837. 



Insectes Apteres, i. p. 648. Hah. Georgia. — Vaiiety of L. mac-^ 

 tans Fabr. 



Latrodectus venator Aud. in Sav., 1825-27. 



Savigny's ' Egypte,' p. 1 38, pi. 3. fig. 1 1 . Hah. Egypt.— Variety 

 of L. tredecwi-guttatus (Rossi). 



Latrodectus verecundus (Hentz), 1850. 



Boston Journ. Nat. Hist. vi. p. 280, pi. x. figs. 1 & 2. Sub 

 Theridion. Hah. N. America. — A dark vaiiety of L. mactans 

 (Fabi-.), having the same relation to it as L. erehus bears to 

 L. IS-guttattos. 



Latrodectus zickzack (Karsch), 1878. 



Zeits. gesammt. Naturwiss. li. p. 311 (1878). Sub Theridium. 

 Hah. Zanzibar. — Variety of L. geometricus 0. Koch. 



Latrodectus zorillus (Walck.), 1837. 



Insectes Apteres, Atlas, pi. 19. figs. 2b, ^d, 2d. Sub Tetra- 

 gnathe zorille, <S ad. — Obviously L. mactans Fabr. 



