1 893.] ENTOMOLOGICAL NEWS. 165 



Pupa. Pupal skin whitish on abdominal portions; head; thorax, and 

 wing cases more glassy, subtransparent, thoracic dorsum and cephalic 

 horns with a slight brownish flavous tinge; transverse dorsal rows of 

 bristles on abdominal segments brownish flavous. Head with one pair 

 of cephalic horns (antennal cases) running straight out laterally and 

 curved upward, set opposite to each other squarely base to base, rather 

 long, thickened on basal one-third or hardly more, annulate on remaining 

 portion, there being eleven quite distinct annulae or segments, the two 

 basal ones a little longer than the others, the horns therefore consisting 

 of twelve joints including the elongate thickened basal joint comprising 

 one-third their length, and corresponding to the joints of the antennae of 

 the adult fly. Head conforming to shape of eyes and head of adult fly, 

 neck constricted. Thorax a little narrower anteriorly than head, grad- 

 ually widening posteriorly to about same width as head; wing cases 

 moderately narrow, reaching a little beyond middle of third abdominal 

 segment below, the leg cases reaching nearly to middle of fourth seg- 

 ment; scutellar segment indistinct, appearing as a portion of thorax be- 

 hind; first abdominal segment bare, hardly as long as following segments; 

 other abdominal segments nearly equal in length, the anal segment a 

 shortened, narrowed and rounded terminally. Segments 2 7 each with 

 a transverse dorsal row of perfectly appressed spine-like bristles directed 

 posteriorly, the rows being a little approximated to posterior margin of 

 segment, especially on segments 4 7, while the row on second segment 

 is almost in middle; each long bristle in the rows is surrounded at base 

 by several shorter, closely approximated bristles about one-half its own 

 length; the longer bristles average somewhat more than one-third the 

 length of the segments. Segment 8 bare; all the segments bare on venter; 

 prothoracic spiracle on anterior lateral margin of thorax; mesothoracic 

 spiracle immediately at base of wing cases; metathoracic spiracle at 

 anterior lateral corner of dorsum of scutellar segment. Abdominal seg- 

 ments i 7 with a spiracle on lateral edge of dorsum approximated to 

 anterior margin. Spiracles are of a slightly flavous tinge. Length, 6 3-5 

 mm. ; width of thorax, each nearly i mm. 



The fly escapes by the pupal skin; splitting along the median 

 dorsal line of the head and thorax as far back as the scutellar 

 segment, beginning just above the base of cephalic horns; and 

 by a break starting from the same point and extending obliquely 

 down and outward laterally on sides of head to junction of head 

 and thorax, a triangular piece of the anterior portion of the 

 integument of the head being thus left attached to bases of ceph- 

 alic horns on their upper side. Long sections of the tracheal 

 integument are left attached to the prothoracic and metathoracic 

 spiracles on the inside, these being sloughed from the tracheae at 

 the same time that the fly escapes from the pupal skin. 



