178 The Ohio Naturalist. [Vol. II, No. 3, • 



II. TRICHODECTES OF THE CENTRAI, AMERICAN COATI AND 



THE RING-TAIL FOX, 



Tjichodedes nasuatis u. sp. (Plate ii, Fig. 3.) 



Broad, light yellowish, abdomen ovate. Length, female, 1.60 nun. 

 Head slightly wider than long, semi-circular in front with shallow emarg- 

 ination at apex and a shallow furrow running from apex to mandibles. 

 Antennal pits rather deep, antennal lobes extending back in obtuse rounded 

 angle, and behind the antennal pit is a rather prominent lobe, behind which 

 the border curves toward the occiput, the postero-lateral angle being very 

 obtuse. Antennae frather slender, joints of about equal length, second 

 shorter than first and third. Thorax short ; legs nearly uniform in size ; 

 anterior tarsal claws short, middle and posterior longer and more slender. 

 Abdomen ovate, broadest about second segment, tapering uniformly to sixth 

 segment.* Scattering bristles on posterior border of each segment incon- 

 spicuous, longer on ventral side than dorsal ; lateral appendages of seventh 

 segment not conspicuously separate from the border. 



This species differs from crassus in having the postero-lateral 

 lobes ronnded and head narrower. As compared with T. pallidns 

 desribed from Nasna rufa of South America the head is less 

 emarginate in front, not so wide as compared with length, and 

 not near so broad or angular for posterior angle, and also varies 

 in size. 



Described from three mature females and one immature indi- 

 vidual .sent me by Mr. George K. Cherrie from Costa Rica, taken 

 from the coati, Nasua narica. 



Trichodedes thoracicus n. sp. (Plate 11, Fig. 4.) 



Short and broad. Head rounded in front, with deep semi-circular emarg- 

 ination and with very strong chitinous borders to the mandibular furrow. A 

 strong projection on anterior border of antennal pit extending over base of 

 antenna. Thorax short, prothorax narrow, short, metathorax with a strong 

 processor inflation on antero-lateral border, the posterior margin of which 

 bears a row of spines, which is continued acro.ss hinder border of the 

 .segment. The abdomen is ovate, widest at the second and third segments ; 

 strong bristles on one to six ; no transverse dusky bands ; lateral appendages 

 on .seventh segment, conspicuous and strongly curved. 



Male, antenna with large swollen basal joint and the head is somewhat 

 more pointed in outline. The genitalia are strongly developed, the lateral 

 pieces wide apart, connected by median bow with a sharp process at tip, 

 and the posterior end of penis with strong bidentate process. 



This species resembles retusus in size and shape and depth of 

 the frontal emargination, but has no transverse bands, and differs 

 particularly in the large lateral processes of the thorax and in 

 details of genitalia. On Bassaris astuta, Lake county, Cal., 

 from Prof. W. G. Johnson. 



