372 



and that it is identical with A. heterophthalmus Sim. Now as it is 

 utterly incredible that Cambridge should have sent Simon and me two 

 different species under the same name of 5. obsourus 3, it follows, 

 that Cambridge, like myself, considers the two forms here in question 

 as S and $ of one and the same species ')■ 



In spite of the considerable difference in the appearance of "A. 

 heterojihthalmus" and "A. brevipes" , these forms agree with each other 

 in many important points; such an agreement for instance appears 

 in the unusal position of the second row of eyes : in both forms these 

 eyes are much farther, nearly double as far, from the hindermost eyes as 

 from the lateral eyes of the anterior row; another similitude is ob- 

 servable in the spine-armature of the legs, which is exactly alike in 

 both. The two posterior pairs are destitute of spines, the tibiae of 

 the 2 nd pair have two weak spines (occasionally, though rarely, there 

 is but one) on the under side, outwards, and their metatarsi two 

 pairs of similar spines beneath; the 1 st pair has two pairs of strong 

 spines under the metatarsus, and two pairs of weaker spines under 

 the tibia , which last however are often difficult to see in consequence 

 of the hairy covering. Also in "A. heterophthalmus" or the male, 

 we frequently see, at least in specimens preserved in spirits, evident 

 signs of the paler longitudinal bands on the cephalothorax (conf. 

 Blackwall's figure, loc. cit.), which are ordinarily observed in the 

 female or "A. brewpes*. 



That A. depressus Walck. is identical with the female of this 

 species, or M. brevipes", is evident from the really good description 

 that Walckenaer has given of it in Faune Franc., Arachn., p. 69. A. 

 anmdipes, which he, in the same work, takes up (from Latreille's 

 description) as a separate species, is certainly identical with A. de- 

 presses. Walceenaer cites under it : "Saltique pieds anneUs Latr. , 

 Nouv. Diet. d'Hist. Nat., XXX, p 100"; I presume that Latreille 

 in that work (with which I am unacquainted), made use also of 

 the Latin denomination 5. annulipes, and I have therefore received it 

 among the synonyms. — A. chalybeius Walck., which Simon places 

 under A. heterophthalmus, and which Walckenaer himself considered 

 as identical with S. heterophthalmus Reuss, probably also belongs to 

 this species; nevertheless this synonym appears to me questionable, 

 for the legs of A. chalybeius are said to be black; and I have there- 



l) This is now also the opinion of Simon, as I see from the second part of 

 his Kevis. d. Attidse, which 1 received after this article was written, and shortly 

 before it was sent to the press; Conf. the Syn. 



