98 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 00. 



stout setae; spiracles small, anterior placed just behind the mouth 

 parts, accompanied by 2-3 small disk pores, posterior placed far 

 back, fully one-third the body length from the anterior, about the 

 same size but without pores; eye spots represented by faimt mar- 

 ginal protuberances a little behind the antennae; with a few tiny 

 tubular ducts around the margin of the cephalothorax ; first two 

 abdominal segments with a considerable cluster of small tubular 

 ducts and a few small slender gland spines with expanded bases ven- 

 trally at margin, remaining segments with similar but fewer ducts 

 at margin and dorsally, including one or two large ducts to a seg- 

 ment and no gland spines ; each segment ventrally with a slender sub- 

 marginal seta and one or two others, smaller, inside this on each side ; 

 pygidium only faintly chitinized, lobes small, triangular, pointed, 

 normally not or only very slightly protruding bej^ond the irregular 

 margin, median lobes slightly smaller than the second pair, widely 

 separated by a quadrate protruberance bearing two slender ventral 

 spines at its base and having a large short-tubular duct between it 

 and each lobe, second lobe placed well beyond the first, also triangular 

 pointed, third still farther beyond the second, and considerably 

 smaller; margin with a large triangular indentation beyond the 

 third lobe; without gland spines; dorsal marginal setae, one out- 

 side of each lobe, ventral the same, and with one beyond the marginal 

 notch, all slender, not very long; ventrally with submarginal setae, 

 considerably larger than marginal and anterior to these, as follows : 

 1, 2, 2, 2; without incisions with thickened edges, but with dorsal 

 marginal incisions into which short tubular ducts open, these ducts 

 one inside the firet lobes, two between the first and second lobes, one 

 just inside and above the second lobe, two between the second and 

 third lobes, one behind third lobe, and three beyond marginal 

 notch; without chitinous paraphyses; anal opening fairly large, 

 oval, much nearer base than apex of pygidium ; paragenitals want- 

 ing; dorsal pores numerous, not arranged in definite rows of closely 

 set pores, although in indefinite rovv^s, about three in first, four in 

 second, 7-8 in third, 5-7 in fourth, and about five in fifth, with 

 some corresponding inner groups of about three each; without 

 thickenings except those running in from the "lobes"; with a few 

 ventral micropores and several small setae in the genital opening 

 region. 



Intcriiiediate stage female — (From exuviae only). Apparently 

 difi^ering from the adult only in the reduction in size and numbers 

 of the structures described for the latter stage. 



Larva — (Embryonic). Oval, antemiae 5-segmented, the fourth seg- 

 ment so constricted as to give somewhat the appearance of another 

 segment; legs slender, normal, apex of abdomen not at all chitinized, 

 with no traces of lobes or gland spines; with two long apical setae. 



