378 



cephalic extension simple, its sides subparallel ; lower, lateral cephalic 

 extensions much narrower than dorso-central, their chitinized portions 

 about half as long, divergent posteriorly. Thoracic spiracle rather 

 small ; each thoracic segment with a long hair on middle of the ventro- 

 lateral line; sides of each abdominal segment except apical two with 

 a large, round, convex highly glossy area ; ventral surface of the same 

 segments each with a transverse ridge-like elevation about one third 

 from anterior margin, which is declivitous on the posterior surface 

 and serves as a locomotor organ ; penultimate, spiracular segment at 

 least as long as ultimate, spiracles located well beyond its middle, 

 their openings longitudinally elongated ; dorsal surface of last seg- 

 ment not as high as preceding segment, armed with eight hairs, 2 on 

 each side transversely at middle (1 submedian and 1 lateral) and 4 

 at apex; apex slightly papilliform. 



Papa (PI. LIII, Fig. 6). — Length, 7 mm. Yellowish testaceous, 

 slightly shining; cephalic armature and the strong abdominal thorns 

 dark brown. 



Cephalic armature Weak, consisting of 2 slight elevations on upper 

 central portion, the upper margins of which are carinate in front, the 

 carinae closely approximated centrally; a weaker carinated elevation 

 below the outer extremity of each of the upper pair; 3 small wart- 

 like protuberances in a vertical series on median line, the upper in 

 line with the inner extremity of the lateral protuberances, the lower 

 with the bases of the antennal sheaths ; antennal sheaths in the form 

 of 2 moderately elevated ridges which taper to a point and are widely 

 divergent apically; center of face with a small wart-like elevation 

 which is slightly above the transverse line of the tips of the antennal 

 sheaths ; 4 long hairs on head — 1 on each side of the upper pair of 

 elevations and 1 on each side of face in vertical line with the bases 

 of antennal sheaths and considerably below the level of the apices of 

 these. Thoracic spiracles small, distinctly elevated, openings circular; 

 disc of thorax with 8 long hairs — 1 on each side of median line before 

 middle and another beyond middle, and a widely separated transverse 

 pair above base of each wing; w T ing extending beyond middle of sec- 

 ond abdominal segment ; apices of fore tarsi extending beyond apices 

 of wings; apical 2 joints of mid, and 3 of hind, tarsi extending be- 

 yond apices of wings. First dorsal abdominal segment with 6 slender 

 upright thorns (their apices turned backward) in a median transverse 

 series, a single long hair between these thorns except in the middle 

 pair, and laterad of the outermost thorn 4-5 long hairs; second seg- 

 ment with 5 very long, strong, backwardly curved hook-like thorns, 

 the middle one very powerful, and single long hairs between all of the 



