458 



equal in length to two thirds the apical diameter of basal joint; third 

 about one fourth as long as second and half as long as fourth, fifth 

 acute apically, about as long as third; apical unjointed appendage of 

 basal joint extending almost to apex of fifth joint; dorsal surface of 

 head with long slender hairs, situated as f ollow' s : four on labrum, one 

 slightly in front of each antenna near suture of median sclerite, one 

 on posterior outer surface of the raised base of antenna, one on each 

 side of median sclerite at the point where the sutures begin to converge 

 anteriorly, one on each side of same sclerite where the sutures begin to 

 converge posteriorly, and three on each lateral sclerite, two of which 

 are almost in transverse line w4th the posterior pair on median sclerite 

 and the other slightly posterior to the anterior pair on that sclerite ; and 

 in addition to these hairs there are the usual tw^o long ones close to eye 

 spots on each lateral margin ; ventral surface with four hairs, one on 

 each side at base of labial plate almost in longitudinal line with outer 

 labial tooth and the other about one third of the distance from the an- 

 terior pair to the posterior margin of head and considerably nearer to 

 median line; ventral respiratory organs present on penultimate abdom- 

 inal segment ; dorsal tufts consisting of six hairs. 



Pupa. — Length, 6-8 mm. Brownish yellow, margins of wing 

 pads, appendages of thorax, lateral margins of abdominal segments 

 and of apical appendages blackened. Thoracic respiratory organs end- 

 ing in numerous white filaments; frontal tubercles as in deconis (PI. 

 XXXI, Fig. 12) ; dorsum of thorax wdth closely placed scalelike 

 setulse ; first dorsal abdominal segment w^ithout setulse, several weak 

 hairs on the surface ; segments 2-6 with disc, except the lateral marg- 

 ins, covered with distinct setulge which are slightly larger and more 

 closely placed posteriorly ; seventh segment with a few much weaker 

 setulae, in groups of 2 or 3, on anterior half ; eighth segment with weak 

 setulae on lateral margins extending nearly to median line posteriorlv ; 

 all segments with several weak hairs; lateral margins of segments each 

 with four or five long hairs, those on eighth segment most distinct; 

 apical lateral appendage of eighth segment as in decorus (PI. XXXI, 

 Fig. 3) ; apical abdominal appendage with fringe of long flattened 

 hairs. 



Imago; Male. — Yellowish green, shining. Head yellow, antennae 

 fuscous, scape shining black, base of flagellum yellowish ; palpi fus- 

 cous; antennal plumes blackish. Mesonotum with the vittae shining 

 black ; sternopleura, a spot in front of wing-base, and postnotum black- 

 ish. Abdomen blackish green, posterior lateral angles of segments 

 broadly yellowish, the yellow^ parts with distinct whitish pruinescence. 

 Legs greenish yellow, mid and hind coxae, apices of fore femora, bases 



