410 ARACHNIDA 



C. muricatus Say. Body 2.5 mm. long and reddish-brown in color; 

 hand of pedipalp very much darker than the rest: eastern states, among 

 dead leaves. 



2. CHELANOPS Nicolet (Chernes Menge). Similar to Chelifer but 

 without eyes: about 19 American species. 



0. oblongus (Say) (Fig. 646). Body 3.5 mm. long, elongate and 

 elliptical in shape, being widest in the middle, reddish-brown in color, 

 being darker on the cephalothorax ; a double row of large dark spots 

 on the abdomen, from each of which a number of long bristles spring: 

 widely distributed over the eastern and central states; under stones 

 near low-water mark at Woods Hole. 



C. tristis Banks. Body 2 mm. long, pale reddish-yellow in color 

 with soft parts and legs white; abdomen elliptical, the dark spots on 

 the dorsal plates being much nearer the median than the lateral line : 

 the seashore of Long Island. 



C. sanborni Hagen. Body 2 mm. long, very broad, and reddish- 

 brown in color; pedipalps short and heavy with clavate hairs: eastern 

 states, under bark. 



FAMILY 2. OBISIIDAE. 



Spinneret a small knob; serrula attached only at the base; 4 eyes 

 usually present: 4 genera. 



1. OBISIUM Leach. Cephalothorax rectangular and not narrower in 

 front; pedipalps short and stout; 4 eyes present; fingers curved: 6 

 species in America. 



0. muscorum Leach. Body 2.5 mm. long, brownish in color : in moss. 



2. CHTHONIUS Koch. Cephalothorax rectangular and wider in 

 front; mandibles large; fingers straight: about 5 American species. 



C. pennsylvanicus Hagen. Length 1.9 mm.; color brownish, with 

 scattered silvery spots on the abdomen; legs white; pedipalps longer 

 than the body; 4 eyes, not close together: eastern United States. 



ORDER 6. PHALANGIIDA.* 



Harvestmen or daddy longlegs. Body short, ovoid in shape, with 

 an unsegmented cephalothorax which is joined with the 9-jointed ab- 

 domen without any constriction; mandibles chelate; pedipalps long and 

 leg-like, each ending with a claw; legs usually very long and slender, the 

 basal portion of the anterior pairs possessing chewing plates; the body 



* See "On the Phalangeae of the United States," by H. C. Wood, Commun. Essex 

 Inst, Vol. 6, p. 10, 1868. "A Descriptive Catalogue of the Harvest Spiders (Phal- 

 angiidae) of Ohio," by C. M. Weed, Proc. U. S. Nat. Mus., Vol. 16, p. 543, 1893. 

 "Synopsis of North American Phalangida," by N. Banks, Am. Nat., Vol. 35, p. 669, 

 1901. 



