18 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.46. 



Segment one barrel-shaped, longer than broad; two somewhat 

 barrel-shaped, more constricted at base than at the tip; three and 

 four fusiform ; five clavate ; six and seven similar in form to five only 

 inverted ; eight long and slender, tipped with a short hair. Segments 

 one and two with a heavy yellow tinge medianly, the sides light gray; 

 three and four gray, almost white; five and six with a broad median 

 tinge of yellow ; seven and eight light brownish gray. Segment two 

 roughened. Segment three bears a long simple transparent sense 

 cone on the outer margin near the tip, and segment four bears a simi- 

 lar cone similarly placed. Head without spines. 



Prothorax shorter than the head, about two-thirds as long as broad, 

 front angles rounded, broadest behind, posterior angles broadly 

 rounded, posterior margin convex; coarsely sculptured, but not so 

 deeply so as the head; spines few and minute; not so dark as the 

 head and mesothorax, wdth an orange tinge in some specimens ; con- 

 stricted at articulation with mesothorax. Mesothorax broadest of all 

 segments, about 0.3 mm. broad (one and one-half times as broad as 

 the head and about one-eleventh broader than the abdomen), its 

 anterior margin concave, its anterior angles acute and slightly over- 

 lapping the hind angles of the prothorax; mesothorax joined by about 

 two-thirds its width to prothorax. Mesonotal plate concave on ant^ 

 rior margin, convex behind except a slight concavity at its juncture 

 with metanotal plate; lateral angles acute; mesonotal plate bears 

 a few small spines of which only the transparent insertions are visible; 

 deeply sculptured. Metanotal plate triangular, with the base some- 

 what convex, the sides straight and meeting in an acute angle behind, 

 deeply sculptured. Mesothorax broadest behind, the sides broadly 

 rounded and roughened. Metathorax with sides convex and rough- 

 ened, narrowing behind. Meso- and metanotal plates, and sides of 

 both meso- and metathorax tinged vnth brown; remainder of meso- 

 and metathorax yeUow. Fore wdngs slightly broadened at the base, 

 slender and long, reaching to the ninth abdominal segment ; slightly 

 sculptured at the base; the veins are indistinct and fade out at the 

 middle of the wing; no spines or fringe upon the costa; spines on 

 the veins few and minute, only the transparent insertions being 

 visible. Hind ^ving with a single median vein. Fore wing at the 

 extreme base brown, the brown area including nearly all of the scale, 

 in some specimens all; remainder of wing gray with yellow longi- 

 tudinal tinge on posterior margin. Hind wing gray with slight shad- 

 ing of yellow. Hind fringe on both wings of medium thickness, long, 

 slender, brown, and for the most part straight, there being only an 

 occasional wavy hair. Legs short, stout, roughened, unarmed, light 

 yellow to lemon yellow; tarsi lighter with black spot at tip within. 



Abdomen joined broadly to the thorax, broadening gradually to 

 the fourth segment, thence tapering gradually to the tip, which is 



