32 PROCEEDIXGS OF THE NATIONAL MUSEUM. vol.46. 



black. Dorsum of head behind the eyes transversely striated. Mouth 

 cone broad at the base, triangular, reaching nearly across the pro- 

 sternum. Antennae approximate at the base, situated below the 

 front, twice as long as the head; relative lengths of segments as 

 follows : 



Segment one cylindrical, as wide as long; two barrel-shaped; three 

 to six clavate; three to seven slightly stalked; seven and eight taper 

 evenly from the middle of seven to the slightly rounded tip of eight; 

 tip of eight bears a slender hair which is about as long as the segment. 

 Sense cones located as follows : One weak cone on the outer margin of 

 three near the tip; segment four with three cones similar in size to 

 the one on segment three: five and six with two each, one on the outer 

 margin near the tip and the other on the inner margin near the tip. 

 Spines on antennal segments brown, of mediimi length. Color of 

 segments: One light yellow; two light yellow with brown shading at 

 the sides; three is light brown with distinct dark brown shading at 

 the sides; four, light brown with dark brown shading on stalk; five 

 to eight increasing in intensity of dark brown toward the tip. 



Prothorax a little more than three-fifths as long as the head, its 

 length on the meson only about three-eighths the width through coxae, 

 in front about three-fourths as broad as through coxae; trapezoidal 

 in shape, sides slightly rounding; one short, stout, blunt dark-brown 

 spine at each posterior angle; one about two-thirds as stout and long 

 as the preceding, midway on each lateral margin; a small blunt spine 

 on each anterior angle; the projections of the fore coxae each bear a 

 short blunt spine; posterior marginals are stout and blunt; anterior 

 marginals are of medium size and blunt. 



Mesothorax noticeably wider than the prothorax, its front angles 

 abrupt. Mesonotum transverse, finely longitudinally striate. Sides 

 of meso- and metathorax nearly straight, the sides of the latter con- 

 verging to the articulation with the abdomen. Connective tissue 

 between head and prothorax finely pigmented with red. Wings well 

 developed and reaching about to eighth abdominal segment. The 

 single median vein of the fore wing fades out at the first third of the 

 wing. Three short, stout, blunt, dark brown spines stand near the 

 base of the wdng. Both fringes of fore \^^ng well developed, composed 

 of long, slender, dark brown hairs. Hind fringe near the tip double 

 for eight hairs. Wings of even width throughout. (The hind wings 

 are folded on the abdomen and are invisible.) Legs well developed, 

 the fore femora are somewhat thickened and about half as wide as 

 the head. All femora and tibiae dark brown, except a gray, almost 

 white, area at the tip of the femora within which extends about one- 



