456 



PSYCHE. 



[May 1S93. 



concolorous with sternum ; anal hooks rufous 

 brown ; long lateral filamentous hairs of 

 abdominal segments rufous, the scattered 

 hairs in the dorsal rows of spines and on 

 sides of venter pale rufous; dorsal rows of 

 appressed spines rufous, darker on tips of 

 spines; spiracles brownish. Four cephalic 

 horns; the upper pair (antennal cases) 

 soldered together on fully their basal two- 

 thirds, much longer and larger than the 

 lower pair, straight and not hooked, stout at 

 base, corrugated and roughened basally but 

 smooth and polished on terminal portion; 

 the lower pair is very short, widely separated, 

 and springs one on each side from the outer 

 base of the upper pair, being continued pos- 

 teriorly in a spine-shaped process (sheath of 

 third antennal joint) ; each horn of the upper 

 pair bears immediately outside its dorsal edge 

 at base a hair arising from an ocellus-like 

 impression, and a similar hair on the outer 

 side less than halfway to tip arising from a 

 slight depression of the surface; each horn 

 of the lower pair has a hair arising from the 

 integument just below and inside its base. 

 Sheath of proboscis closely appressed to the 

 sternum, and extending back to a point 

 immediately below base of scutellar segment. 

 Cephalic segment moulded above to the 

 shape of the eyes of the imago, constricted 

 posteriorly at its junction with the thorax, 

 with a short hair on each side at the posterior 

 margin laterally and a little inferiorly. 

 Thorax (the soldered proscutum and meso- 

 scutum minus the scutellum) but little wider 

 than head, constricted anteriorly, bulging 

 laterally behind at wing bases; dorso-pleural 

 region with three weak hairs arranged in a 

 triangle and considerably removed from each 

 other, the upper and lower ones in a perpen- 

 dicular line and the third posterior to this 

 line and about equally distant from the other 

 two; leg and wing sheaths free, extending 

 under the abdomen, the two posterior leg 

 sheaths extending fully to base of fifth 

 abdominal segment (6th abdominal segment 

 of Brauer), the wing sheaths nearly to middle 



of second abdominal segment ; scutellar seg- 

 ment with six or seven lateral hairs ante- 

 riorly. Abdominal segments 1 to 4 of nearly 

 the same width (the 4th but slightly nar- 

 rower), and a little wider than scutellar seg- 

 ment; segments 5 to 7 successively narrower, 

 the 7th fully one third the width of 

 basal segments; segments 1 to 7 armed on 

 the dorsum with a median transverse row of 

 closely set perfectly appressed posteriorly 

 directed spines, those in the middle of the 

 rows being a little shorter than those on the 

 sides, each row (except the one on the 7th 

 segment) approximated at its ends to the 

 anterior margin and in its middle to the pos- 

 terior margin of the segment; these rows of 

 appressed spines are in addition sparsely 

 set with posteriorly directed appressed hairs 

 two or three times the length of the spines, 

 the hairs being longest on the sides; the lat- 

 eral hairs on scutellar segment and those 

 among the rows of spines on the abdominal 

 segments are microscopically pubescent. 

 Scutellar segment and abdominal segments 1 

 to 6 furnished on their inferior lateral edge 

 each with three (except 6th segment which 

 has only two) long inferiorly and a little out- 

 wardly directed filamentous or thread-like 

 hairs on each side, those on the scutellar seg- 

 ment usually directed straight outward 

 (instead of inferiorly) and curved suddenly 

 forward ; these hairs are nearly all much 

 longer than the width of the segments from 

 which they depend, except those on the 6th 

 abdominal segment which are about as long 

 as the width of the segment; those on the 

 first two basal segments are considerably the 

 longest; a few shorter hairs spring from the 

 lateral ventral surfaces of segments 1 to 6; 

 the last are microscopically pubescent, but 

 the long filamentous hairs are only sparsely 

 so on their distal portions. Seventh segment 

 with posteriorly directed appressed hairs on 

 sides, but without hairs or only short weak 

 ones on ventral surface. Anal segment a 

 little more narrowed than 7th, directed some- 

 what downward as is also the 7th, less dis- 



