Vol. xxii] ENTOMOLOGICAL NEWS 53 
Mazillae with the inner lobe attenuate at tip, which bears three 
short internal teeth, and three long, slender, curved, internal processes 
and a row of strong setae. (PI. III, figs. 20, 31). Labium, when fold- 
ed at rest, reaching back to the bases of the prothoracic legs but not 
as far as the hind ventral prothoracic margin; median (mental) lobe 
but very slightly produced distad in the middle and with a very slight 
median cleft, distal margin crenulate with a very short seta between 
each crenulation and its neighbor; just within the crenulations a short 
distance on each side of the median cleft is a small pointed tooth (fig. 
28, t*) on the dorsal surface; mental setae few (2-4 on each side of 
the median line both on dorsal and ventral surfaces) and short; lateral 
lobes with a long curved tapering terminal spine and three distal 
teeth of which the most internal (mesial) is shortest and is truncate 
while the other two are pointed. (PI. III, figs. 27, 28, 30). 
Prothorax with three lateral tubercles, a dorso-lateral (a) which 
is dorsal to an antero-lateral (b) and, posterior to (b), a postero-later- 
al (c). On the mesothorax the place of a of the prothorax is occupied 
by the spiracle, b is present while c is represented by a double tubercle. 
None of these tubercles are represented on the metathorax which has an 
indistinct spiracle on its lateral surface (Pl. II, 14, msp). Front wing 
pads reach to the hind end of abdominal segment 6 in larva No. 1, to 
the hind end of segment 4 in larvae Nos. 3 and 4. Hind wing-pads reach 
almost to the mid-length of segment 7 in larva No. 1, to mid-length of 
segment 5 in Nos. 3 and 4. (In Pl. Il, fig. 14, the wing-pads have been 
divaricated and are not in exactly normal positions, hence the difference 
between the preceding sentence and the figure). Legs not of a burrow- 
ing type, tarsi 3-jointed with an empodium-like structure (PI. II, figs. 
6, 12). 
Abdomen triangular in cross-section, of ten complete seginents, 
which decrease slightly in width from 1 to 8; 9 and Io distinctly narrow- 
er Owing to their lateral margins not being produced laterad as far as 
on the segments preceding (Pl. II, fig. 15). A curved, caudad-directed, 
mid-dorsal hook on segments 2-9 (larva No. 1) or I-g (larvae Nos. 3 
and 4), hooks increasing in length from segment I or 2 to segment 7 
or 8, that of 9 slightly shorter than that of 8 (PI. II, fig. 14). Hind 
dorsal margin of segment 10 with a wide median notch whose depth 
is half, or less than half, the length of the segment. (PI. II, fig. 8). 
Segments 2-7 each with a pair of tapering, finger-like ventral gills. 
Rudiments of ¢ genitalia on the ventral side of segment 2 indistinct 
in larva No. 1; in larva No. 3 they consist of two distinct black lines 
reaching from the intersegmental groove of I-2 to behind the hind end 
of the sternite of 2. Rudiments of ¢ gonapophyses are present on 
segment 9 of larvae Nos. 1 and 3 (PI. Il, fig. 18). Rudiments of 9 
gonapophyses are shown in PI. II, figs. 7, 8, 14, 15. 
