Vol. Xxii] ENTOMOLOGICAL NEWS. 451 



setae. Lateral labial lobes (PI. XVII, Fig. 5) with a long tapering 

 terminal articulated spine and two tapering distal teeth, the inner 

 (mesial or ventral) of which is the longer, 6-7 setae between the 

 terminal spine and the base, and a group of 4-6 (8-9 Cordoba) short 

 conical spines on the lateral margin opposite the most proximal seta. 



Thorax without well-developed tubercles or other peculiar struc- 

 tures. Mesostigmata latero-dorsal, between prothorax and mesothorax, 

 elongated transversely. Metastigmata smaller, lateral, close to the 

 anterior margin of the somite. In the alcoholic larvae, the front wing- 

 pads reach to slightly posterior to the middle of abdominal segment 

 4 (Nos. I and 2), or to the anterior edge of 5 (No. 58), the hind 

 wing-pads to the hind end of segment 4 (Nos. i and 2) or to the mid- 

 dle of 5 (No. 58). In the (metamorphic) exuviae, the point reached 

 by the front wing-pads varies from the anterior edge of 4 to one- 

 fourth the length of 4 and that reached by the hind wing-pads from 

 one-third to one-half the length of 4. These differences between the 

 larvae and the exuviae are probably due to the distortion produced 

 by the process of exuviation. 



Legs slender, with very short hairs on the longitudinal carinae, tarsi 

 three-jointed with two untoothed claws which are curved and very 

 sharp at the apex (PI. XVII, Fig. i), no empodium; on the distal part 

 of the tibicc and on each lateral margin of the plantar surface of the 

 tarsal joints are one or more rows of strong, trifid (or less frequently 

 quadrifid or pinnate) spines (PI. XVII, Fig. 4), whose length ranges 

 from .07 mm. to .15 mm. 



Abdomen subcylindrical, of ten complete segments, decreasing grad- 

 ually in width and in height from i to 10, without dorsal or lateral 

 hooks, covered with minute hairs .1 mm. long. Viewed ventrally, the 

 lateral margins of each of segments 1-7 widen caudad from the an- 

 terior end to two-thirds or three-fourths of the segment's length and 

 thence narrow to the posterior end. Hind dorsal margin of 10 in the 

 middle shallowly concave and produced upward (dorsad). 



Rudiments of accessory male genitalia visible under the chitin on 

 the ventral side of abdominal segment 2. Male gonapophyses rep- 

 resented by two strong sharph-pointed spines on the ventral side of 

 9, situated at three- fourths of the segments' length, about half as 

 long as 9 and projecting ventrad and caudad to the level of the middle 

 of 10. 



Female gonapophyses : ovipositor, in the alcoholic larvae, reaching 

 to the middle (No. 2), or to seven-eighths (No. 58) of abdominal seg- 

 ment 10, in the exuviae to seven-eighths of 10, or to beyond this seg- 

 ment for a distance equal to about one-eighth of the length of 10; 

 the sharply-pointed genital valves reach to the middle of 10 (No. 2), 

 or to barely beyond 10 (No. 58), or in the exuviae to beyond 10 for 

 as much as one-third of the length of 10. 



