1905.] NATURAL SCIENCES OF PHILADELPHIA. 323 



cP Leg : I 



Tar 29 



Met 29 



Tib 29 



Cephalothorax broadly oval, squarely truncate before; head sloping 

 gradually behind the eyes, obliquely descending and transversely 

 depressed in the eye region; the lateral eyes occupying prominent 

 angles on the sides of the head ; color dull yellowish-brown ; top of head 

 armed with a median longitudinal series of four long curved hairs ; one 

 hair back of each posterior median eye; eye area thinly clothed with 

 short hairs. Posterior eyes in a straight line, the median eyes a little 

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

 than their diameter and from the lateral by three times their radius; 

 anterior eyes in a strongly recurved line, the median eyes slightly 

 smaller than the lateral, subcontiguous but separated from the lateral 

 by two and two-thirds times their diameter. Median ocular area very 

 much longer than wide. Clypeus narrow, plane and retreating; ster- 

 num broad, very wide behind between the posterior coxse, light brown 

 near the center and very dark near the edge, slightly rugose; endites 

 yellow brown, labium darker. Abdomen completely covered above by 

 a yellowish-brown sclerite; below the large epigastric sclerite surrounds 

 the pedicle and is only narrowly separated from the dorsal sclerite 

 except behind; no inframamillary sclerite present; soft parts gray. 

 Legs and palpus very light yellow. Tibia of palpus armed above at 

 tip with a short incurved tooth on the iaside and with a broad blunt 

 projection on the outside, armed below with a short rather blunt tooth. 

 One specimen collected in pine leaves on the ground near Ithaca, New 

 York, August, 1904. 



EXECHOPHYSIS. 



The following species is placed here with considerable doubt. There 

 is great variation in the amount of chitinization of the dorsal sclerite 

 of the abdomen, and also to a less degree in the form of the lobes of the 

 head. It differs markedly from Ceraticelus in the form of the male 

 palpus. 



Exechophysis plumalis n. sp. (PI. XXVIII, figs. 8, 13; PI. XXIX, fig. 1.) " 



d^. — Length 1.3 mm. Cephalothorax, wide .55 mm., long .75 mm. 



Legs I IV 



Tar 24 .20 



Met 36 .40 



Tib 40 .48 



Pat 19 .19 



Fem 48 .53 



