16S Annals Entomological Society of America [Vol. X, 



Thorax about three times as broad as long. Prothorax lenticular 

 in outline, with the posterior margin very slightly eonvex. Four weak 

 spines distributed along the lateral margin. Metathorax at first 

 abruptly diverging, than as abruptly converging, with a wide, angulated 

 emargination medially. A very short spine at each posterior lateral 

 angle, a long hair just behind this, and a similar hair midway on the 

 converging margins. Legs normal. 



Abdomen subquadrate in outline, widest on the third segment. 

 Segnients 1 to 6 with rather well defined plates at the lateral borders. 

 Each of the twelve plates with a hair near the posterior angle. First 

 segment devoid of spines. Second segment with a spine at each lateral 

 border. Third to fifth segments each with a lateral group of three 

 spines. Sixth and seventh segments each \vith a lateral group of four 

 spines. Eighth segment with a transverse row of six spines, and with 

 six spines on the posterior margin — three on either side of the center. 

 Segment eight slightly, and segment nine deeply emarginate medially. 

 Segments two to seven each with a spiracle at the lateral margins. 

 Transverse spines lacking on segments one to seven, inclusive. 



Trichodectes floridanus n. sp. 



Four females (McGregor, No. 9878) from dog, Monticello, 

 Fla., November 2G, 1913, coll. H. B. Scammell. 



This species is nearest T. latiis N., also of the dog, but is 

 clearly distinct through the nature of the antennas, the female 

 appendages, the shape and markings of head, the shape of the 

 thorax, and in the presence of the prominent spiracles on the 

 prothorax. 



Description of Female. — Total length, 1.5 mm.; length of head, 

 .37 mm. ; length of prothorax, .135 mm. ; length of metathorax, .083 mm. ; 

 length of abdomen, .915 mm.; width of head between eyes, .551 mm.; 

 width of prothorax, .405 mm.; width of metathorax, .488 mm.; width of 

 abdomen, .811 mm. 



Head just half again as wide as long, with a wide, shallow emargi- 

 nation anteriorly, and with the usual trabecula-like process just before 

 each antenna. Antennal sinuses distinct, but not deep. Ocdlar 

 projections distinct, bvit not prominent. Temporal margins commence 

 to converge immediately behind the eyes, and meet the occipital margin 

 with an obtuse curvature. Occipital margin rather concave for nearly 

 the entire width of the prothorax. Antennal bands scarcely dis- 

 cernible, reduced to faint, linear spots at the posterior ends of 'the 

 clypeal margins which are the darkest portions of the head. A crescent- 

 shaped spot of about the color of the antennal bands occurs just inside 

 each of the antennal sinuses. Occipital bands entirely lacking. Five 

 short hairs occur on each of the clypeal margins, a similar hair occurs 

 at the base of each trabecula just over which a longer hair arises, one 

 short hair arises from each eye and one immediately behind this, two 

 longish hairs near the temporal angle, three weak spines on each side 



