30 Wisconsin Academy of Sciences, Arts and Letters. 



PHILAEUS CHRYSIS Walck. 



Plate I, figure 20. Plate II, figure 20. Plate III, figui'e 20a. 



Syn.: 1837. Attus clirysis ( 6 ) Walck., Hist. Nat. des Insectes Apteres, I, 

 p. 454. 

 1837. ' ' iris ( ? ) Walck. , id. , ibid. , p. 455. 



1846. Plexippus aurecalceus, C. K. , Die Arachniden, XIII, p. 113. 



1847. Attus clirysis Walck. , Hist. Nat. des Insectes Apteres, IV, p. 



433. 

 1847. " iris, id., ibid., p. 423. 



6 . Total leBgth 9 mm. Width of abdomen 2.8 mm. 



Cephalothorax; length 3.9; width 3.5; height 2.8. 



Legs 13.7, 9.5, 9.4, 10.9; patella and tibia of the first, 5.7; patella and tibia of 

 the third, 3.4; patella and tibia of the fourth, 4.4; metatarsus and tar- 

 sus of the fourth, 3.2. 



Falces 3 mm. 



Ocular area one-third wider than long; anterior row of eyes very little 

 curved; lateral rather more than one-half as large as middle eyes, and 

 separated from them by one-half their own diameter; dorsal smaller 

 than lateral eyes, and equally distant from each other and the lat- 

 eral borders. Clypeus one-fourth as high as middle eyes. Falces 

 compressed, as wide as the middle eyes, two and one-half times as 

 long as the face, inchned forward, and diverging; the fang is two- 

 thirds as long as the falx. Maxillse parallel, long, truncated, with a 

 projection at the outer corner; labium blunt, one-half longer than 

 wide, and one-half as long as the maxillae. Sternum truncated in 

 front, rounded behind, one-fourth longer than wide. Anterior coxae 

 separated by width of labium. Relative length of legs 1, 4, 2, 3. 



9 . Total length 10.9 mm. Width of abdomen 4.2 mm. 



Cephalothorax: length 4.2: width 8.8; height 2.1. 



Legs 9.2, 7.9, 8.1, 9.4; patella and tibia of the first, 4.1; patella and tibia of 

 tlie third, 2.8; patella and tibia of the fourth, 3.5; metatarsus and 

 tarsus of the fourth, 3. 



Falces 1.9 mm. 



Falces vertical, parallel, and not ;:;o long as in s ; maxillae rounded; labium 

 more than one-half as long as maxillee; anterior coxse separated by 

 more than the width of the labium. Relative length of legs 4, 1, 3, 2. 



Coloration: As well as it can be distinguished from our badly rubbed 

 specimens, the coloi'ation is as follows: $ , cephalothorax black; ab- 

 domen black, encircled, excepting at the apex, by a white band, and 

 with two pairs of white spots, or rather of short transverse white 

 lines, on the posterior part of the dorsum; the under side of the body, 

 and the legs, black, or very dark brown. $ , cephalothorax black; 

 abdomen covered with golden scales, with a white band around the 



