318 PROCEEDINGS OF THE ACADEMY OF [April, 



its type. In 1893 Banks {Jour. N. Y. Ent. Soc, I, p. 130), considering 

 that Emerton did not propose Ceratinella to replace Ceratina, but rather 

 to designate the species which he placed under it, proposed Ceratinodes 

 for Menge's genus, and has since retained the name Ceratinella for the 

 American species. 



Ceratinella is easily distinguished from Ceraticelus by the double 

 curve in the claw of the chelicerse. 



Ceratinella brunnea Em. 



9 Leg I Palpus 



Tar 26 .22 



Met 26 



Tib 34 .12 



Pat 17 .1 



Fem 46 



Posterior eyes in a very slightly procurved line, the median eyes 

 smaller than the lateral, separated from each other by a little less than 

 their diameter, and from the lateral by their radius; anterior eyes in a 

 straight line, the median eyes slightly smaller than the lateral, sub- 

 contiguous but separated from the lateral by two-thirds their diameter. 

 Median ocular area a little wider than long. Clypeus narrower than 

 ocular area. Claw of chelicerae ciu'ved twice, first concave and then 

 convex without. 



CERATICELUS E. Sim. 



Banks {Jour. N. Y. Ent. Soc, I, p. 130) proposed the genus Idionella 

 for C. formosa Banks, based on the position of the dorsal sclerite of the 

 abdomen, a character of less than specific value in some species of the 

 group. In certain species of the group this sclerite is wholly lacking 

 in some individuals, while strongly developed in others of the same sex. 



The figures and notes on the species described by Fox are from 

 mounts of male palpi taken from the type specimens. 



Ceraticelus albus Fox. (PI. XXVIII, figs. 1, 2.) 



d" Palpus. 



Tar 26 



Tib including the hook .19 



Pat : 29 



Ceraticelus alticeps Fox. (PI. XXVIII, fig. 3.) 



(S^ Palpus. 



Tar 22 



Tib width including hook .192 



Pat 204 



