140 
Psyche 
[August 
Ripersia petiolicola sp. vov. 
Occuring in the hollow bases of the leaf petioles of the host, 
attended by ants. 
Adult Female . — Preserved in liquid leaving none of the se- 
cretionary covering available for examination, average length 
as mounted, 1.3 mm., width 0.875 mm; clearing completely 
on treating with potassium hydroxide, except for the appen- 
dages; antennae small, placed fairly close together at anterior 
apex of head, not unusual, normally 6-segmented, but frequently 
5 and rarely 4-segmented, the normal measurements in microns 
ranging as follows: I, 33-39, II, 29-36; III, 36-43; IV, 18-25, 
V, 18-25; VI, 50-61; legs normal, fairly stout, claw without 
denticle, hind femur and tibia each with a number of pores; 
beak triangular, with an incomplete basal collar and two distinct 
segments; with the usual two pairs of dorsal ostioles; only the 
two anterior and the two posterior cerarii developed to a definitely 
recognizable state, the anal pairs with relatively large conical 
spines, several triangular pores and four to six accessory set*, 
the spines in the other recognizable cerarii slender, lanceolate, 
setalike, the pores less numerous and the accessory setee fewer 
or wanting; probably with a more or less complete series of 
cerarii around the body margin, but these not definitely re- 
cognizable, due to the separation of the component parts; 
anterior cerarii with three spines in each, all others with two; 
anal lobes slightly indicated, with the apical cerarii underlaid 
by a faint suggestion of chitinization, with a small, irregular, 
elongate ventral thickening and an apical seta about 100 u long; 
largest anal ring seta about 78^; anal ring normal with the usual 
pores and six set*; body, as far as noted, with only two sorts of 
derm pores, a few r multilocular disk pores around the genital 
opening and smaller triangular pores scattered rather uniformly 
over the surface, but more numerous along the margin and in 
the cerarii; body dorsally with some scattered, slender, lanceo- 
late set* and ventrally with even fewer, distinctly longer and 
more slender, hair-like set*; with a single, indistinct, transverse 
oval ventral cicatrix posterior to the hind legs. 
