128 JOURNAL OF ENTOMOLOGY AND ZOOLOGY 



This genus differs from Cceculus Duf. in that the palpi are 

 not raptorial but tactile, are composed of four instead of five 

 segments, and are unarmed instead of bearing claws. The eyes 

 are sessile, not stalked as in Cceculus, and a single, median 

 eye is also present. The arrangement of the shields which 

 cover the body is different from that found in Cceculus. There 

 is a pair of horn-like processes on the anterior part of the 

 cephalo-thorax and another pair on the dorsal aspect of the 

 chelieerae. The legs are less spinous than in Cceculus. 



Ceratoacarus pacificus n. sp. 

 (Fig. 3) 

 Female — Robust; body and anterior pair of legs reddish 

 brown; the rest of the appendages a yellowish brown. Integ- 

 ument of the bod}', chelieerae and the anterior pair of legs well 

 chitinized and coarsely granular ; the integaiment of the remain- 

 ing parts of the body not so well chitinized and more finely 

 granular. Chelieerae very large, surpassing the jialpi ; together 

 they are almost as broad at their bases as the width of the 

 cephalo-thorax at its anterior end. Each chelicera bears at its 

 anterior end a small, curved, simple hair; and above near the 

 middle a jirominent horn-like tubercle, which bears in turn a 

 long, simple, tactile seta which extends beyond the tips of the 

 chelieerae. Segment I of palpus as broad as long; segment II 

 slightly over twice as long as broad; segment III subequal to 

 segment II; segment IV short, papilla-like, and bearing four 

 large, long tactile bristles and one much shorter bristle. 

 Cephalo-thorax not distinct from abdomen. Anterior shield 

 about three times as broad as long, and bearing at eacli anterior 

 lateral corner a prominent seta-bearing horn; seta of horn 

 simple, curved, aboiit twice as long as the horn itself and 

 arising from the lateral side of the same about one-half the 

 distance from the base. Median eye prominent, larger than 

 either of lateral eyes. Posterior dorsal shield covers all of the 

 abdomen and more than one-half of the cephalo-thorax; broad- 

 ened at the shoulder region where are situated the lateral eyes, 

 and just back of these a larger pair of sensory organs which 



