422 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.51. 



is yellowish, or nearly colorless, with brownish shading over the 

 tracheal pores; shape elhptical to subcircular; size 1.6 by 1.4 mm. 

 (Parasitized specimens are of quite a different color, being more or 

 less shaded with dark brown on the dorsal disk. This is often very 

 dark and extends almost to the cephahc extremity of the case.) The 

 dorsmn is very sUghtly elevated, but more so in parasitized indi- 

 viduals, and the abdominal segments are quite distinct. The thoracic 

 and caudal tracheal folds are very distinct; the pore itself (fig. 8) is 

 situated a short distance mesad of the margin, and is armed with 

 seven or eight rounded processes. Surrounding these is a clear area 

 without sculpturing and inclosed by a distinct ring. Outside of this 

 ring, surrounding it and extending for a considerable distance mesad, 

 is a series of dark sculptured areas, irregular in size and shape. The 

 band of these sculptures extending from the caudal breathing fold 

 reaches the vasiform orifice and extends around on both sides, though 

 the markings are not present cephalad of it. The bands extending 

 from the thoracic breathing folds are crossed by similar longitudinal 

 ones on the outer margin of the dorsal disk. The entire dorsum 

 excepting the extreme central portion of the dorsal disk is covered 

 with faint irregular coarse sculpturing (fig. 9) . The vasiform orifice 

 (fig. 7) is somewhat rounded cordate, with the cephahc margin 

 straight. Entad of the lateral and caudal portion of rim the surface 

 is minutely spinose. The operculum is similar in shape to the orifice 

 and almost completely fills it, leaving the extreme setose tip of the 

 lingula exposed. The margin of case is almost entire, being marked 

 with minute indentations between wax tubes, the sutures extending 

 mesad as faint markings, which gradually merge into the faint dorsal 

 sculptm-ing above mentioned. 



Adult female. — Color fight brownish, darker on the thorax and on 

 dorsum of abdomen. There is a dark circular marking aroimd the 

 vasiform orifice. The legs are brown. We are unable to give the 

 length of the insects, as the specimens we have are shrunken and 

 broken. The antennae, too, are either absent or so shi-miken in the 

 specimens at hand that no description can be given. Forewing (fig. 

 1) 1.54 by 0.80 mm., covered thickly with white meal-like powder 

 and appearing rather bluish in color. When mounted and examined 

 under the microscope the wing appears rather uniformly brown or 

 smoky in color. The radial sector is thick and irregular, and on its 

 proximal portion and in about the middle two circular sensoria (fig. 2) 

 are noticed. Each of these is surrounded by a clear irregular trans- 

 parent area. Toward the distal extremity the radial sector is 

 strongly curved. There is a clear, unshaded, narrow band which 

 seems to represent the cubitus and another shorter line of a similar 

 nature. Although the body of the wing is uniform smoky, there are 

 a number of darker areas represented. These are generally situated 



