138 Psyche [August 



specimens mostly a light j^ellow brown; body elongate oval, 

 tapering somewhat behind the middle; average length 3.5 mm., 

 width 2.25 mm; uniformly elongate oval when flattened on a 

 slide; clearing completely, except for appendages and ventral 

 chitinized thickenings, on treating with potassium hydroxide; 

 antenna? normally 8-segmented, not unusual, the range of 

 measurements in microns of the different segments as follows: 

 I, 68-78; II, 64-71; III, 46-53; IV, 28; V, 43-57; VI, 43; 

 VII, 46; Vni, 110-118; legs fairly large, stout, the claw without 

 denticle, the digitules normal, those of claw slightly knobbed 

 at tip, all the legs without tiny pores, but all the coxae with large 

 distinct basal aerolations, and the femora and tibiae with similar, 

 but quite indistinct, very large aerolations on the upper halves 

 of each; beak short and stout triangular, two segmented; 

 spiracles large and stout, with a number of disk pores near mouth; 

 with two pairs of heav}^, thick-lipped dorsal ostioles, cerarii 

 very strongly developed, those on the posterior abdominal 

 segments narrowly but distinctly isolated from each other, 

 those on the anterior portion of the body united to form a 

 narrow continuous submarginal band made up of hundreds of 

 closely crowded lanceolate spines and triangular pores flanked 

 within by dozens of slender seta? aggregated to form more or 

 less distinct groups; posterior cerarii made up of numerous 

 lanceolate spines (apical about 70, preapical about 85, ante- 

 penultimate about 80, fourth from last about 70, next about 

 65, next about 55) and within each of these ventrally a triangular 

 cluster of setae and in and around both spine and setae clusters 

 numerous triangular pores; anal lobes not developed, ventral 

 chitinous thickening heavily chitinized, irregular in shape, en- 

 closing three or four setae; apical setae set off just outside the 

 ventral thickening, large and stout as compared with the anal ring 

 setae, perhaps three times the length of these (broken); anal ring 

 placed dorsally well anterior to the body apex, small, of normal 

 structure, with double pore row and six setae, the derm on each 

 side of the ring protruding and overlapping to form two longitu- 

 dinal folds covering the ring, except for a linear or oval median 

 slit; derm dorsally with numerous, uniformly distributed. 



