REVISION OP STREPSIPTERA — PIERCE. 107 



27. STYLOPS SOLIDULjE, new species. 



Host. — Andrena solidula Viereck; collected at Pullman, Washing- 

 ton, by C. V. Piper, and A. solidula Viereck (junonia Viereck), bearing 

 same date, all determined by H. L. Viereck. Described from one 

 male and three females (pi. 2, figs. 7, 13; pi. 4, fig.6). 



Male. — A male pupa was extracted, which furnishes the following 

 characters. Antennae with third joint not quite attaining tip of 

 sixth; fourth, fifth, and sixth joints subequal, with sixth slightly 

 longer than fifth. The mandibles were not visible; the first joint of 

 the maxilla? seems to be short, the second is elongate flattened, some- 

 what tapering to the apex and considerably longer than the sixth 

 segment of the antennae. The oedeagus is of peculiar shape, being 

 bent at about a right angle upward with the lower outside angle 

 acutely produced downward and the outer side almost straight from 

 this angle to the apex; the lower side is broadly and shallowly 

 sinuate; the upper side is broadly rather deeply emarginate in the 

 middle one-third. The adult in its puparium measured 3.25 mm. 



Male. — Cephalotheca: Transverse, broadly elliptical, convex, the 

 eyes occupying only a little over one-half, of the width. Face divided 

 medianly by the broad arched margin of the vertex, above the center 

 of which is a short transverse reversed ridge. The vertigial margin 

 extends only two-thirds of the distance from the center to each eye. 

 Immediately above the ends of this margin and extending almost 

 to the eyes are the large suboval antennal analogues, which are 

 indicated by several faint concentric rings and a difference of surface. 

 Below the vertigial margin is a transverse arched area bounded below 

 by an indistinct line parallel and equal to the vertigial margin. 

 This strip, which may be a labral or clypeal analogue, has a punctured 

 surface in distinction from the upper part of the pharyngeal area 

 which is distinguished by a mass of closely sinuate lines. The entire 

 pharyngeal area is somewhat keystone-shaped, roughly divided by 

 sculpture into three areas of which the upper has just been described. 

 The median area contains the opening of the pharynx and is laterally 

 deeply emarginate for the reception of the mandibular analogues. 

 These analogues are prominent and sharply defined, and considerably 

 closer to the pharynx than to the eyes; they arise below the ends of 

 the labral analogues and are separated from the antennal analogues 

 by a distance equivalent to the width of that strip. The maxillary 

 are contiguous to the mandibular analogues and slightly closer 

 together on the inner side; they are faintly defined by a large sub- 

 elliptical area, including a much smaller ellipse. The labial analogue 

 is a narrow marginal strip. 



Female. — Length of cephalothorax 1.38 mm., breadth at spiracles 

 1.26 mm., breadth at base of head 0.70 mm., distance between mandi- 

 bles 0.19 mm. Cephalothorax brown with darker band at base; 



