70 



PROCEEDINGS OF THE NATIONAL, MUSEUM. 



VOL. 60. 



3-segmented, legs apparently wanting; mentum apparently l-seg- 

 mented, spiracles small ; marginal setae and spiracular spines appar- 

 ently wanting; no dorsal or A^entral surface setae noted; dorsally 

 with scattered, small, slender tubular ducts penetrating the chitin 

 through small clear openings, and a row of small closely set pores 

 through the chitin running forward from the anal plates on each 

 side of the median line for a short distance; ventrally with only 

 tiny quinquelocular disk pores, these a few near the spiracles, 



Fig. 23. — Lecanochiton metrosidbri Ma.skell.. A. larva, outline, ventral, X165; B. 



ADULT FEMALE, ANAL PLATES, X 220 ; C. ADULT FEMALE, OUTLINE FROM ABOVE, X 32 ; D. 



ADULT FEMALE, SPIRACLE, X 640 ; E. LARVA, ANTENNA, X 335 ; F. LARVA, LEG, X 335 ; G. 



ADULT FEMALE, ANTENNA, X 440 ; H. LARVA, SPIRACLE AND SPINE, X 500 ; I. LARVA, ANAL 

 PLATES, X640. 



continued into a row of widely scattered pores running to the body 

 margin, around this, and for some distance onto the dorsal surface; 

 no similar pores noted near the anal plates ; anal plates small, slender, 

 tapering, with a short, stout apical seta, one or two dorsal setae placed 

 behind the middle, with three ventral ridge setae and with a single 

 fringe seta on each side; anal ring set just anterior to the plates, 

 small, with pores and apparently six setae. 



Larva. — Elongate oval, antennae 6-segmented, legs normal, all 

 digitules knobbed at apices, one of the tarsus longer and stouter than 

 the other, one of the claw stouter than the other, claw without den- 



