144 PROCEEDINGS OF THE NATIONAL MUSEUM. 



Segment one nearly spherical and slightly narrower than two which is 

 broadest; three and four fusiform; five similarly formed to four at its 

 base, but quite broad at its apex, and rather broadly joined to six which 

 with style tapers gradually to tip. Color: One white and nearly trans- 

 parent; two pale or brownish yellow; three and four pale yellow; three 

 lio-ht brownish at tip and four in outer half; remainder of antenna light 

 to dark brown, base of live somewhat lighter. 



Prothorax about three-fourths as long as wide, a little longer and a 

 little wider than the head; sides about parallel; angles rounded; trans- 

 versely striated on dorsum; only one long, slender spine at each hind 

 angle; anterior third of ]n-()notum concolorous with head, remainder 

 marked with a saddle-shaped patch of brown, the anterior edge of 

 which is concave and sharply defined; six or eight medium-sized spines 

 stand in this dark border, behind it there are six more or less well- 

 dt^iined brown spots. Pterothorax large and apparently symmetrically 

 formed on account of first segment of abdomen l)eing closely joined to 

 metathorax and closelj^ approaching it in color; meso and metathorax 

 equally wide and about one and one-half times as wide as the pro- 

 thorax; metanotal plate light brown; rest of pterothorax bright or 

 dusky yellow, except small brown spots at anterior edge of mesonotuni 

 and at anterior angles. Wings long, reaching to tip of alxlomen; 

 fore wings very slender beyond the basal fourth, breadth at middle 

 only about one twenty-sixth their length; only the fore longitudinal 

 vein is f ullv developed, though vestiges of the hind vein may be seen 

 at the base. Spines upon costa and fore veins dark broAvn and con- 

 spicuous; twent3^-two to thirty on costa; twenty to twenty-six on fore 

 vein placed at regular intervals; two isolated spines stand upon the 

 last fourth of the wing on the line where the hind vein might be 

 expected; the scale bears four spines along its inner edge and one 

 discal near its base. Fore wings uniformly dusky or marked with 

 three white and two gray-])rown cross bands alternating; scale also 

 gra}" -brown; anterior fringe long and fine on outer two-thirds of costa. 

 Legs, especially hind pair, quite long and slender; general color pale 

 3'ellowi^h with brown markings on fore femora above, both outer and 

 inner sides of fore tibiae, around outer halves of middle and hind 

 femora, around middle of these tibia?, and bases of all bladders. Tarsi 

 slender and tapering; hind tibia? without stout spines within. 



Abdomen cylindrical, tapering sharply from anterior edge of eight, 

 or acute avoid; two to two and one-third times as long as broad; thickly 

 clothed with minute slender spines appearing most prominently as a 

 fringe on hind edges of dorsal plates. Eight to ten spines upon each 

 segiucnt from two to eight, two or three of these stand quite closely 

 tog(>ther in a group upon each side, and the middle pair stand very 

 closely together upon segments two to five, but separate more widely 

 upon following segments and become larger; spines upon last twoseg- 



