Vol. xxii] ENTOMOLOGICAL NEWS 55 
branches of the main lateral trachea and the gill tracheae divide and 
redivide inside each gill (PI. III, figs. 20, 25, 26). Owing to the opacity 
of the chitin, the thickness of the gills and the obstacles met in clear- 
ing them, I have not been able to make out more than the main branches 
of the tracheae supplying the caudal gills (Pl. II, fig. 9). The stomach 
is supplied from two anterior and two posterior tracheae, one anterior 
and one posterior on its right side and similarly on its left side. The 
right and left anterior gastric tracheae lie parallel and close together 
on the dorsal surface of the oesophagus and crop; each is probably a 
derivative from the main dorsal trunk of its own side of the body, but 
this was not definitely ascertained. At the anterior end of the stomach 
each anterior gastric trachea divides into a set of (two) dorsal and a 
set of (four) lateral branches as shown in PI. II, figs. 13 and 17. The 
fourth, or ventralmost, lateral branch .apparently forms an anasto- 
mosis with the corresponding branch of the opposite side of the 
stomach. 
The hind-gut or intestine is likewise supplied by branches from the 
main dorsal tracheal trunks. The trachea which passes to the ileum also 
furnishes the posterior gastric trachea for the same side of the 
stomach. The rectal epithelium appears to form three (glandular?) 
dorsals and two laterals. (Fig. 109, rdrt, Idrt, rirt, lirt). After the 
drawings forming figures 13, 17 and 19 were made, the alimentary canal 
was slit open lengthwise, stained, dehydrated, cleared and mounted in 
balsam. No definite indications of rectal tracheal gills were found and 
the rectal walls appear much less richly tracheated than those of the 
stomach. The rectal epithelium appears to form three (glandular?) 
areas. The gastric epithelium was disintegrated. No food was found 
in the alimentary canal. 
The three thoracic pairs of ganglia are clearly distinct from each 
other. Posteriorly are seven pairs of smaller ganglia, located as fol- 
lows: I in metathorax, 2 in anterior part of abdominal segment 2, 3 
in hind part of segment 3, 4 at the articulation of segments 4 and 5, 5 
in anterior end of segment 6, 6 in anterior end of segment 7, 7 in the 
middle of segment 8. The nerve cord in the male larva dissected (No. 
3) passed to the right of the distinct rudiments of the genitalia pro- 
jecting dorsad into the cavity of segments I and 2. 
DISCUSSION OF THE More INTERESTING FEATURES OF CORA 
LARVA, 
In current classifications Cora is placed in the Caloptery- 
ginae or Calopterygidae (= Agrioninae of the catalogues of 
Kirby, Muttkowski, etc.). Most of the Calopterygine larvae 
