44<4 Mr. J. Blackwall on the Structure, Functions, QLconomy, 



niden/ M. Walckenaer has placed the first and second among 

 the synonyma of Theridion denticulatum, and the third among 

 those of Theridion tinctum ; he has also referred to fig. 1056 as 

 a portrait of a female, whereas it most unequivocally represents 

 a male. My own observations serve to confirm the accuracy of 

 the view taken by M. Koch. 



90. Theridion pulchellum. 



Theridion pulchellum, Walck. Hist. Nat. des Insect. Apt. t. ii. p. 31 1. 

 formosum, Blackw. Lend, and Edinb. Phil. Mag. Third Series, 



vol. X. p. 101. 

 Theridium vittatum, Koch, Die Arachn. B. iii. p. 65. tab. 94. fig. 217; 



Die Arachn. B. iv. p. 118. tab. 141. fig. 326. 



This species is found in summer and autumn on rails and 

 gates about Oakland, The plan of its snare is similar to that 

 on which the snares of other Theridia are constructed. In June 

 the female deposits about 29 spherical eggs of a yellowish white 

 colour, not adherent among themselves, in a globular cocoon of 

 white silk of a fine but compact texture, measuring ^th of an 

 inch in diameter. Near the cocoon, which is sometimes attached 

 to the under side of a leaf by fine lines of silk, she takes her sta- 

 tion, and on the approach of danger endeavours to secure her 

 treasure by seizing it with her falces, palpi, and feet. 



91. Theridion carolinum. 



Theridion carolinum, "Walck. Hist. Nat. des Insect. Apt. t. ii. p. 315. 



dorsiger, Hahn, Die Arachn. B. i. p. 82. tab. 20. fig. 61 (mis- 

 numbered 60 in the plate). 



Linyphia bimaculata, Koch, Uebers. des xArachn. Syst. erstes Heft, 

 p. 10. 



I have taken this rare spider among grass near woods at Oak- 

 land. In June the female fabricates a globular cocoon of white 

 silk of a slight texture, measuring j^th of an inch in diameter, 

 in which she deposits about 50 spherical eggs of a pale yellowish 

 white colour, not agglutinated together. The cocoon is attached 

 to the spinners by short silken lines, and is transported with her 

 wherever she goes, in the manner of the Lycosce. 



92. Theridion versutum. 



Theridion versutum, Blackw. Annals and Mag. of Nat. Hist. vol. xviii. 

 p. 302. 



The only specimen of this species which has come under my 

 observation was a male ; it was captured in the neighbourhood 

 of Winchester in July 1846 by James Franklin Preston, Esq., 



