34 PROCEEDINGS OF THE NATIONAL MUSEUM. TOL. 60. 



spine-like setae, these most frequent in the area surrounding the anal 

 ring; anal ring a minute ovate chitinous ring placed beyond the 

 posterior end of the recurved dorsal chitinized band, and so located 

 ventrally. 



Intermediate stage femaW^^ (not of Maskell).. — About 1 mm. long, 

 elongate, slender, tapering and rounded at each end, the head more 

 broadly; antennae 5-6-segmented, semirudimentary ; broad and 

 stout at base, and tapering strongly to a rounded point, the terminal 

 two segments with some stout spines and setae; legs similarly re- 

 duced, stout, claw stout, with two large teeth at base, to which the 

 digitules may possibly attach in perfect specimens, tarsal digitules 

 normal, threadlike, apices slightly knobbed, not extending beyond 

 the apex of the claw; mentum apparently 1-segmented; spiracles 

 not unusual, with a single quinquelocular disk pore immediately 

 adjacent; with a few similar pores dorsally in the thoracic region; 

 derm both dorsally and ventrally thickly set with small knoblike 

 protuberances, these largest dorsally in the anterior portion of the 

 body, progressively decreasing in size to a finely granular condition 

 in the abdominal region ; derm with occasional little groups of stout 

 spines each set in a ringlike base on the head, these in more or less dis- 

 tinct rows dorsally and ventrally on the remainder of the body, and 

 somewhat larger posteriorly; anal ring small, simple, located at the 

 posterior end of the body, without traces of anal lobes. 



Larva. — Elongate oval, antennae with four stout segments, all bear- 

 ing setae, and the last two with a short spine on each ; legs normal, 

 the claw long and slender, both pairs of digitules long and slender, 

 knobbed at apices, the tarsal attached well back from the apex and 

 much longer than the claw digitules; body with a marginal row of 

 24 large 8-shaped pores extending clear around the body; spiracles 

 tiny, each bearing one quinquelocular pore ; apex of abdomen without 

 traces of anal lobes, but with a pair of relatively large and stout 

 setae, between these the minute, simple anal ring, and above this a 

 smaller pair of setae ; each 8-shaped pore with a tiny seta above and 

 below it, in addition with submedian rows of tiny setae both dorsally 

 and ventrally on each half of the body; the median caudal lobe 

 figured by Ferris not discernible in the limited material available 

 for study. 



Cotype.—Qnii. No. 24759, U.S.N.M. 



Both the second stage female and the young larvae were taken 

 from a test which also enclosed an adult female. No species other 

 than the type has been included in this genus, and in view of its 

 peculiarities it is quite probable that it will continue to stand alone. 



»" Subsequent examination of various stages of related species suggests that the writers 

 have possibly been mistaken in considering this as the second stage female, but no 

 definite conclusion has been reached as to the stage it really represents. 



