32 



PECKHAM. 



[Vol. 1. 



like the rest of the face.^ Amycus tristriatus has a high face, 

 the hairs around the eyes being white in the lower half and 

 yellowish red above. - 



In the nine species of the genus Amycus described by the 

 two Kochs, we have only males; in the South American spiders 

 of this genus described by Simon and Taczanowski/' we have 

 both sexes in four species, and in three of these the clypeus of 

 the female is low ; in the fourth it is said to be " rather high." 

 The great height of the clypeus in Amycus is, in fact, a sexual 

 peculiarity, although in some instances 

 it may have been transmitted to the 

 female. 



By far the most remarkable instance 

 of facial adornment is to be found in 

 Mopsus mormon* (Fig- 10.) The face of 

 the male is dark brown, covered with 

 steel-blue scales; around the ej'-es are 

 both brown and yellowish red hairs ; the 

 front of the long fakes is also dark 

 brown, covered with bright metallic 

 scales ; and to add to his beauty there 

 is a high vertical ridge of variously tinted 

 hairs extending over his forehead. The 

 Mopsus mormon V^^^^ abovc the middle eyes is brown, but 



(tromL.Koch). Upperfigure ..i -j -i. i j. i -i 



tacean<ifalcesotmale,show- OU Cither Side it ChaUgeS tO pure whltC, 

 Ing ridge of liairs; lower . n • i 



figure, face and faices of gradually becoming yellowish as it passes 

 back on to the sides. In the female, while 

 the general coloration is the same, the most striking orna- 

 ment — the band of hairs — is entirely absent. In this species 

 we are reminded of the wonderful crests found in humming- 

 birds and fruit pigeons. In Dendryphantes elegansthe male alone 

 has two oblique converging ridges of short hairs extending from 

 the eyes of the second row to the anterior middle eyes ; and in 



1 Koch and Keyserlmg, loc cit., p. 11V3. 



2 Id ihid., p. 1181. 



3 A. rufifrons, Simon; A. fuscomauus, A. mystacalus, A. scops, Taczanowski. 

 i Arachniden Australiens, p. 1319, described as Asvyltus penclUatus. 



