506 



on the inner side is produced forwards so as to form a pointed 

 lobe. — The oldest specific name of this spider, triangidosa , must of 

 course be restored. 



(Pag. 467.) Euchariiim obscurnm. 



Titanmca qvadri-gntlala (Hahn) 1831. 



Syn.: 1831. Thekidion 4-guttatum Hahn, Die Arachn. , I, p. 84, Tab. XXI, 



figg. 63, 64. 



1836. „ id., Monogr. Aran., VIII, PI. 2, figg. a, b. 



1837. Asagena 4-guttata C. Koch, Uebers. d. Arachn. Syst. , 1, p. 13. 

 1850. Latrodectus 4-guttatos id., ibid., 5, p. 23. 



1869. Titanceca quadri-guttata Thor., On Eur. Spid., p. 124. 

 1872. „ „ L. Koch, Ueb. d. Spinnengatt. TitancRca, 



p. 155. 



L. Koch, loc. cit. , has remarked, that Theridinm obscurnm 

 Walck. ') ? cannot be the same spider as Ther. 4-guttatum Hahn ?, 

 as Walckenaer and others suppose: this is immediately evident from 

 the fact that the cocoons and eggs of the two species are "altogether 

 different. In Tit. 4-guttata the cocoon is, according to L. Koch, 

 formed of a yellowish white woolly web, and the 20—25 eggs are 

 of an orange-yellow colour, whereas in Ther. obscurum the cocoon 

 is described as dazzling white, and the numerous eggs are also 

 stated to be white. In Walckenaee's spider the four white spots, 

 that adorn the abdomen of Tit. 4-guttata d\ are absent: in both the 

 male and female of Th. obscurum Walck. the abdomen is said to be 

 of a uniform dark brown colour. 



Ther. notatum Walck. 2 ), under which Walckenaer includes 

 Ther. 4-guttatum Hahn (?, is also undoubtedly different from Hahn's 

 spider, as is evident from the description of the spots on the ab- 

 domen: the hindmost of these spots are stated in Th. notatum to be 

 situated "above the anus", whereas in Tit. 4-guttata cf they are 

 situated in the midst of the back: in the former species the spots 

 are stated to be dark yellow, in the latter they are white. 



Amaurobius Kochii Auss. 3 ) is not, as I (loc. cit.) supposed, iden- 

 tical with T. 4-guttata, but is a separate species of the genus Tita- 

 nceca: vid. L. Koch, loc. cit., p. 170. 



1) Faune Par., II, p. 209; H. N. d. Ins. Apt,, II, p. 335. 



2) H. N. d. Ins. Apt., II, p. 334. 



3) Die Arachn. Tirols , I , in Verhandl. d. zool-bot. Gesellsch. in Wien, XVII, 

 p. 162, Tab. 7, fig. 5. 



