Pomona College, Claremont. California 29 



a pair of similar waxen rods arising in the cephalic region and 

 extending upward over the case, a pair each on two segments of 

 the thorax and on segments 3, 4, 5 and 6 of the abdomen. In addi- 

 tion to the dorsal secretion the case bears a continuous high, ver- 

 tical fringe of coalesced, white, wax rods which extend from the 

 margin of the case to the leaf. This wax functions as a support 

 for the case and it remains firmly attached to the leaf when the 

 case is removed. The pores which give rise to the dorsal wax 

 secretion are large, 0.012 mm. in length, conical in shape and are 

 arranged in a rather irregular submarginal row of about sixty in 

 number ; also a pair of similar pores in the cephalic region, a pair 

 each on the two segments of the thorax and a pair each on segments 

 3, 4, 5 and 6 of the abdomen. Between the bases of the submarginal 

 wax pores may be found very small circular pores, a row of similar 

 circular pores between these and the margin of the case, and along 

 the dorso-meson from the cephalic region to the vasiform orifice a 

 pair for each segment, though occasionally missing on some seg- 

 ments. Segments of the dorsum are distinct and in the abdominal 

 region the sutures are strongly bent caudad. Vasiform orifice sub- 

 cordate, length 0.06 mm., anterior margin straight, inner lateral 

 margins with corrugations extending downward. Operculum sub- 

 semielliptical, about one-half filling the orifice. Lingula slightly 

 hidden, subspatulate, densely setose, projecting slightly beyond the 

 orifice and bearing at its distal extremity a pair of terminal and 

 three pair of lateral lobes. Submarginal area not set ofl" from the 

 dorsum by a raised ridge or depression. Thoracic tracheal folds not 

 visible. Conspicuous caudal spines present, arising just within the 

 caudal margin, but cephalo-marginal and latero-caudal marginal 

 spines absent. 



Adult female: — Length 1.0 mm., general color yellow to 

 orange, eyes very dark brown, constricted but not divided. Fore- 

 wing length ].15 mm., radial sector, media and cubitus present. 

 The radial sector is the main vein of the wing extending through 

 the central area. The media is reduced to a remnant, being very 

 short and faint and arising as a branch of the radial sector. The 

 cubitus appears as a cleared line arising independently of the radial 

 sector and projecting caudad toward the margin then paralleling it 

 for a very short distance before ending. The portion of the wing 

 through which the cubitus passes is very slightly dusky or unclear 

 thus making the cleared vein more distinct.* Length of antennae 

 segments from segment 1 to segment 7 inclusive, as follows : 0.024 

 mm., 0.052 mm., 0.128 mm., 0.048 mm., 0.064 mm., 0.044 mm., 

 0.040 mm. Paronychium blade-like. 



This species was described from an abundance of pupae and 

 several adults taken by the writer on tarweed (Chamaebatia 



*This type of vein is spoken of by Bemis (Proceedings of the U. S. Nat 

 Museum, vol. 27, page 493) as a long, oblique, anal fold. 



