192 PROCEEDINGS OF THE NATIONAL MUSEUM vol. i08 



cephaloventrad; anterior edge slightly sinuate, distinctly margined. 

 Surface of collum very finely coriaceous, with a row of eight widely 

 separated, very small setae near the anterior margin and a similar 

 row of ten such setae paralleling the caudal margin. 



Paranota of segments 2-4 swept forward, those of segments 5-8 

 nearly transverse, the remainder becoming increasingly bent caudad. 

 Anterior corners of all paranota rounded, the posterior corners obtusely 

 angled back to 7 th segment, caudad of which the angle becomes in- 

 creasingly acute. Paranota moderately wide, about a third the diame- 

 ter of the body cylinder, those of anterior segments continuing slope of 

 dorsum but becoming nearly horizontal toward the rear of the body; 

 anterior edges set off by an acute ridge and shallow depression, lateral 

 edges merely tumid and shining; pores opening on the dorsal side of 

 swelling, exactly halfway along its length ; caudal edges slightly convex, 

 meeting the edge of metazonite proper at a re-entrant angle. Paranota 

 of 18th segment forming elongate triangular lobes which extend caudad 

 to level of the caudal margin of 19th, lobes of the latter segment short, 

 broadly rounded. 



Dorsal surface of metatergites finely but distinctly coriaceous, set 

 with a large number of very tiny setiferous tubercules. Interzonal 

 furrow broad, deep, and finely costulate. Anal segment much broader 

 than long, its median projection short and distally truncate, with a 

 large setiferous knob at the base on each side. Anal valves with very 

 distinct swollen margins, surface of valves with fine vertical striations 

 and a pronounced knob in the center of each near the base. Preanal 

 scale semicircular, with a slight median projection; lateral setiferous 

 tubercules very small and removed from the margin. 



Sternites smooth and completely glabrous, sternal area of meta- 

 zonites raised between the legs into a platform much higher than level 

 of prozonite (the new term "podosternum" is suggested with reference 

 to this modification). Interzonal furrow sharply defined, its anterior- 

 most portion partly overhung by the caudally reflected edge of the 

 prozonite. Pleurites very finely granular, without other sculpture. 



Legs relatively long and slender, the coxae without distal spines 

 but those of prefemora long and sharp, distinctly curved caudad. 

 Femora clavate, about as long as coxae and prefemora combined, 

 postfemora short and thick, tibiae much longer and more slender, 

 tarsi slender and gradually tapering, more than lialf as long as femora; 

 tarsal claw nearly straight, slender, more than half the length of tarsus. 

 Leg joints becoming increasingly setose distally, tip of tarsus set with 

 numerous long macrosctae. Sternites of segments 4-6 not produced 

 or modified in any way. Sternal aperture of 7th segment broadly 

 oval, the entire caudal margin with a raised rim; anterior margin dis- 

 tinctly emarginate at the middle. 



