8 ME. AND MES. PECKHAM ON [May 7, 



f Spiders covered with light brown hairs and a few longer black 



I hairs; 34 12 Pellenes banksi. 



I Abdomen brown, with a longitudinal, median, yellow band ; 



Qj legs 3 4 1 2 Prostheclina venatoria. 



\ Abdomen iridescent, with four velvety black spots ; legs 3 4 12. 



1 Prostheclina morgani. 

 Grreen and crimson iridescent scales on cephalothoras, abdomen, 



^ and legs Prostheclina perplexa. 



NiLAKANTHA, n. gen. 



Small, pale spiders. 



The cephalothorax is moderately high and is widest and highest 

 behind the dorsal eyes. The sides are slightly contracted in front 

 and behind. The cephalic part is a little inclined, and the thorax 

 falls steeply from just behind the dorsal eyes. The quadrangle 

 of the eyes is one-third wider than long, is a little wider behind 

 than in front, and occupies one-half of the cephalothorax. The 

 first row of eyes is plainly curved downward, the eyes being all 

 close together, with the middle twice and a half as large as the 

 lateral. The second row is nearer the first than the third, and 

 the third row is as wide as the cephalothorax at that place. The 

 legs in the male are 1 4 3 2, and in the female 4 3 12. 



This genus resembles, in a general way, our Plexippus puerjoerns 

 Hentz (Attidae of North America, p. 33), but the spiders are 

 smaller, the curve of the first row is different, and the middle 

 eyes of this row are larger. 



NiLAKANTHA COCKEEELLI, n. sp. (Plate II. figs. 1-1 g.) 



(S . Length 4'5 mm. Legs 14 3 2, first a little stoutest. 



2 . Length 4-5-5-5 mm. Legs 4 3 12, first stoutest. 



This is a small, pale, yellow species, with four square black 

 spots on the eye-region. The lateral eyes of the first row and 

 the small eyes of the second row are upon the front pair of spots, 

 and the dorsal eyes on those that are further back. The clypeus 

 and the sides of the cephalothorax are covered with light yellow 

 hairs, which are found also in the spaces between the four black 

 spots. The abdomen is marked with black specks, which form, 

 more or less distinctly, lines of chevrons over the dorsum. The 

 male has a baud of yellow hairs around the front end and the 

 sides. The falces, palpi, and legs are yellow, a little darker in 

 the male. 



We have one male and three females from Moneague and 

 Kingston, Jamaica. 



This species is named after Mr. T. D. A. Cockerell, of Las 

 Cruces, New Mexico. 



Ctbelb geisea, n. sp. (Plate II. figs. 2-2 e.) 



Length, cf 5"5-6'5 mm., 5 6-7 mm. 



Legs, cJl342; $4312, not very unequal. 



The cephalothorax is high, with the cephalic part inclined. 



