20 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.46. 



Head five-ninths as long as broad; somewhat retracted within the 

 pro thorax: front produced between the antennae; narrowed behind, 

 broadest through the eyes; no hairs or spines visible upon the head; 

 cheeks convex, eyes strongly protruding, coarsely granulated and 

 together three-fifths the width of the head; ocelli approximate, not 

 contiguous mth inner margins of eyes, the posterior ones on a fine 

 with the hind margins of the eyes, the anterior one on line with the 

 center of the eyes, yellowish by reflected light, black by transmitted 

 light, margined inwardly with bright red crescents; maxillary palpi 

 two segmented, transparent white, the first segment slightly longer 

 than the second; labial palpi minute. Antennae seven segmented, 

 the relative lengths of the segments as follows: 



1 2 3 4 5 6 7 



3.25 6.25 7.3 6.2 6.3 6.3 6.9 



Segment one short and cylindrical; two much the largest, globular 

 viewed from above, cone shaped viewed from the side; three to five 

 pedunculate — three and four conspicuously so, five slightly so — 

 three ovoid; four and five barrel shaped; six nearly cylindrical mth 

 base and tip slightly narrowed; seven slender and the blunt apex 

 bearing three short, slender, transparent hairs. The seventh segment 

 bears four other hairs, one near the base, two at the middle, and one 

 near the tip. 



The other segments, except the first, bear a few minute colorless 

 hairs which increase in length upon each succeeding segment. Color 

 generally ver}^ light yellow — in some specimens almost white — except 

 segment six which has a slight tinge of broAvn near the tip, and seven, 

 which is very light brown with a tinge of yellow. 



Prothorax trapezoidal, broadest behind, in front broader than the 

 head and as long as or slightly longer than the head, width at hind 

 angles nearly twice the length. Front angles noticeably rounded, 

 high angles only slightly so. Pronotum behind very weakly cross 

 striated. No spines upon pronotum except a pair of slender white 

 ones upon each posterior angle. Prothorax somewhat constricted 

 at its juncture with the mesothorax. Mesothorax about two-fifths 

 wider than prothorax, widest in the middle, narrower than prothorax 

 at juncture with prothorax but widening rapidly to the middle, 

 slightly converging behind; a shoulderlike projection at each front 

 angle. Metathorax narrower than mesothorax but about one-fourth 

 wider than the prothorax, its sides nearly parallel. No spines on 

 either the mesonotum or the metanotum. Wings very slender, reach- 

 ing to end of the abdomen, broadest in first tliird, at the middle about 

 one-twentieth as broad as long; nearly transparent whitish, costal 

 fringe of fore wings composed of a few long, slender, colorless bristles 

 intermixed with shorter almost colorless spines. Costa bears 20 to 22 



