100 Mr. B. F. Cummings on 



Isopogometric Apparatus. — Anterior cornua of the sclerite 

 as lono; as the main body. The distal end o£ each cornu 

 rounded, narrower than at the base. The main body is 

 lemon-sliaped, the posterior narrow end drawn out into a 

 short truncate " tab." The upper surface is concave ; on 

 each side a narrow chitinous band runs up on each side of 

 tlie pharynx. This band partly arises from the basal part 

 of the anterior cornu. The " glands ■'' or basal pieces are 

 rounded oval, each with a thick stout tendon inserted into it 

 behind, some way in front of the posterior margin. Around 

 the bifurcating chitinous chords is a thin plate (? hypo- 

 pharynx. A similar piece is present and has been described 

 in Lipeurus ferox, P. Z. S. 1913, p. 129). 



Male Copidatory Apparatus (fig. 4, p. 99). — The hasaJ plate 

 is o£ rather complex sculpture, sufficiently shown in the figure. 

 Tn the median area it is thin and transparent, the lateral 

 margins, however, being thickly chitinized. Parameres fused 

 at the tips. Each paramere is a short band, narrow at the 

 base, broader at the end, where it fuses with its fellow along 

 the whole line of its breadth and projects in front as a small, 

 somewhat depressed beak. Endomeres are fused together at 

 the base and shaped like a pair of tweezers. The '^preputial 

 sac" is remarkable for the possession of a number of large 

 denticles, of which there are two longitudinal rows, four in 

 each, with a large number of smaller teeth in a group behind. 

 This description, it must be pointed out, is made of the 

 apparatus retracted. 



By reference to the sketch of the genitalia of T. mephitidis 

 in the paper by V. L. Kellogg and G. F. Ferris (" Anoplura 

 and Mallophaga of N. American Mammals," Stanford Uni- 

 versity Publications, 1915, pi. viii. fig. 4), it may be surmised 

 that the genitalia of that species closely resemble T.gastrodes. 

 On this and other smaller characters T. mephitidis^ Osb., and 

 T. interrupto-fasciatus should, perhaps, be regarded as the 

 nearest allies of T. gastrodes. 



Aleasurements {mUlimetre-scale^ 



S. $_• 



Length. Greatest widtb. Length. Greatest width. 



Head -71 -85 -73 -87 



Thorax -32 -71 -35 -li 



Abdomen 1-73 -90 1-72 1-10 



Total 2-76 2-80 



