140 Psyche [August 



Ri Persia petiolicola sp. vov. 



Occuring in the hollow bases of the leaf petioles of the host, 

 attended by ants. 



Achdt 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, excei)t for the appen- 

 dages; antenna? 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 accessor}^ seta3, 

 the spines in the other recognizable cerarii slender, lanceolate, 

 setalike, the pores less numerous and the accessory setse fewer 

 or wanting; probably with a more or less complete series of 

 cerarii aroimd the body margin, ])ut 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 lOOyu long; 

 largest anal ring seta about 78/i; anal ring normal with the usual 

 pores and six setse; bod}-, as fai' as noted, with only two sorts of 

 derm pores, a few 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 dorsallj^ with some scattered, slender, lanceo- 

 late setse and ventrally with even fewer, distinctly longer and 

 more slender, hair-like setse; with a single, indistinct, transverse 

 oval ventral cicatrix posterior to the hind legs. 



