204 C- 0. SARS, 



hairs, and the 2 posterior ones have besides, on either side of tlie dorsal face, 

 2 small juxtaposed spinules, as in some species of the genus Gammams. 



The cephalon (see fig. 1, conip. also PI. VI, fig. 2) scarcely exceeds in 

 length the first 2 segments of mesosome combined, and is comparatively 

 deep in proportion to its length, with the lateral faces quite smooth. The 

 rostral projection is very short and blunt, though distinctly defined, and the 

 lateral lobes are but little projecting and broadly truncated at the tip, being 

 defined from the acutely projecting postantennal corners by a slight emar- 

 gination encircling the basal joint of the inferior antennsc. 



The coxal plates are of moderate size, the 4 anterior pairs being, as 

 usual, much larger than the 3 posterior, and somewhat deeper than the 

 corresponding segments. The 1st pair (see fig. 11) arc slightly expanded 

 distally, and considerably broader in their outer part than the 2nd pair (see 

 fig. 12), their terminal edge being broadly rounded and, as in the other 

 pairs, only fringed with a few scattered hairs. The 2 succeeding pairs are 

 somewhat deeper than the 1st and of oblong quadrangular form, the 3rd 

 being somewhat broader than the 2nd. The 4th pair (see fig. 13) are much 

 the largest, being rather expanded in their outer part and produced 

 posteriorly to an obtusely truncated lobe, above which the posterior edge 

 forms a distinct emargination, to receive the anterior part of the 5th pair. 

 The latter (see fig. 14) are about twice as broad as they are deep, and, as 

 usual, divided into 2 lobes, the anterior of which is but little larger than 

 the posterior. The 2 posterior pairs (see figs. 1 5 and 1 6) successively de- 

 crease in size, and are also slightly bilobed. 



The epimeral plates of the metasome are of moderate size, the 2 poste- 

 rior pairs being, as usual, somewhat larger than the 1st pair, and nearly 

 rectangular in form, with the lateral comers but little produced. 



The eyes (see fig. 1), which are placed on the sides of the head, at a 

 short distance from the anterior edges, are not very large and of a narrow 

 reniform shape, with dark pigment. 



The superior antennae (see fig. 1) nearly attain half the lengtli of the 

 body, and are rather slender, with only small scattered bristles at the edges. 

 The peduncle is somewhat elongated, being about twice as long as the 

 cephalon. The 1st joint is by far the largest, though scarcely as long as the 

 other 2 combined, and the latter are not very different in length. The fla- 

 gellum is about half as long again as the peduncle, and composed of numer- 

 ous short articulations, their number varying from 20 to 25. The accessory 

 appendage (see fig. 3) is well developed and about as long as the last ped- 

 uncular joint, being composed of about 5 articulations. 



$ji3.-MaT. cTp. 204. 26 



