NKW AMKRICAN ACARINA. 211 



Maiuiibles prominent, slender, nearly as lonj; as fenuir i. Two rows of lonj; 

 stiff' bristles near the median line of the body, a few others ou the cephalotliorax 

 and some extra ones at tip of abdomen. Legs very large and long, the fourlii 

 pair longest, all with many long bristles, but no shorter hairs. Some of the 

 bristles on patellfe and tibije iii and iv are nearly as long as tibia iv. The 

 bristles are more numerous, tbougli shorter, on the metatarsi and tarsi than on 

 the basal joints. Metatarsus ii is not broken up into smaller joints, all of the 

 tarsi slightly curved. All the bristles are finely serrate. The palpi are quite 

 large, the penultimate joint with a long, slender claw, beneath which is a much 

 smaller otie. The last joint or tliiitnb is cylindrical, nearly four times as long 

 as broad, reaching much hevond the end of the claw, and is furnished with 

 many long bristles, .some at Uie ti]i Ix-ing the longest. 



Locality. — 8ea Cliff, T.,<)iig Island, N. Y. 



.IC'TIXKD.l Koch. 



The body does not show any division, but is quite triangular, 

 broadest behind, the legs are shorter than in ErijiJirceu.^, and body 

 and legs are covered with shorter hairs. Palpi tour-jointed (the fifth 

 is supposed to be represented by the presence of three large spines 

 near the tip of the fourth). Eyes present; they move very rapidly 

 and irregularly. 



One species is very coninion on Long Island on grass, ascending 

 trees and bushes in search of food. I have seen them eat the young 

 larvie of currant-worms. 



A<*fiiiO<la agiiis nov. sp. — Length 1. — 1.2 mm. Body triangular, the an- 

 gles rounded, a hlack eye each side. In front of the eyes there are four bristles ; 

 behind the eyes there are four rows of these bristles, four in each row. The 

 legs bear a number of similar bristles, and are quite thickly clothed with finei- 

 hairs. Palpi with many bristles: the third joint hears on its inner side near the 

 tip three stout spines, the outermost slightly longer than the other two; the last 

 joint is much longer than the preceding, but has no terminal claw. The lower 

 jaws of the mandibles, which are longer than the upper, end in two prominent 

 claws. Each of the anal plates bears four haiis. Specimens found on the ground, 

 grass or bushes, ai-e yellowish, or but faintly red ; specimens on trees are bright 

 red, but I faii to find that they are otherwise different. I have found freshly 

 moulted specimens encased in little silken white cocoons on chestnut trees, so I 

 presume they have the power of spinning. 



Locality.— Sea Cliff, Long Island, N. Y. ; Ft. Lee, N. J. ; Chicago, 

 111. ; Franconia, N. H. (Mrs. Slos.son). 



In die Tr()nil)ididie the abdomen is very large and much elevated 

 above the cephalotliorax. The eyes are four, two on each side at 

 the end of a clavate pedicel which arises from the cephalotliorax. 

 The palpi are five-jointed, the last joint forming a clavate appendage 

 or thumb. The body and legs are thickly clothed with hairs. The 



TRANS. AM. ENT. SOC. XXI. JUNE. 1894. 



