224 Mr. R. I. Pocock on new 



sulci, the rest (except the anal) strongly bisulcate ; all of them 

 (except the anal) immarginate. 



Sternites strongly bisulcate. 



Anal somite. — Tergite with raised lateral margins and a 

 median sulcus ; pleurce narrow, densely porous, without a 

 process, with a single small spine in the position of the 

 process ; sternite nearly oblong, longer than wide, with rounded 

 lateral angles ; legs stout, short ; femur convex externally, 

 flattened internally, the process long, conical, and armed with 

 two spines, the upper inner edge furnished with one or two 

 strong spines, the inner surface with from seven to nine 

 smaller spines, of which two are on the posterior margin and 

 the rest irregularly scattered, and the under inner edge with 

 two stronger spines ; patella flattened internally with a smooth 

 prominence on its under inner edge ; first tarsal segment 

 anteriorly excavated beneath ; claw long, finely keeled and 

 anteriorly serrate beneath, without spurs. 



Legs with strong and strongly bicalcarate claws and un- 

 armed tarsi ; proximal tarsal segment shorter than the distal. 



Stigmata long and slit-like, especially in the anterior part 

 of the body. 



Length (of largest specimen) 80 millim. ; width of head 

 4 millim., of maxillary sternite 5, of anal tergite 4 5. 



Two specimens (one measuring 60 millim. long) from 

 Iguarassu (Brazil), collected by Mr. H. N. Ridley and Mr. 

 G. A. Ramage. 



Pithopus calcaratus, sp. n. (PI. V. fig. 2 e.) 



Body slender, almost parallel-sided, slightly wider at the 

 posterior end. 



Colour wholly ochraceous, shining. 



Head-plate punctured, witli a complete median longitudinal 

 sulcus and a posterior arched transverse sulcus. 



Antenna} of moderate length, very thick at the base, attenu- 

 ate, composed of nineteen segments, whereof the basal six are 

 bare and the rest pubescent. 



Maxillary sternite punctured, sulcate in front, as in the case 

 of P. inermis ; prosternal plates long, almost in contact, each 

 bearing three indistinctly defined blunt teeth ; basal tooth 

 long, on a level with the prosternal plates. 



Tergites. — The first overlapping the head-plate, not sul- 

 cate; from the second to the twentieth strongly bisulcate, 

 with a faint longitudinal impression between the sulci, and at 

 each of the anterior angles there is a short oblique sulcus ; all 

 (except the twenty-first) with simple unraised margins. 



