Vol. xxii] ENTOMOLOGICAL NEWS 55 



branches of the main lateral trachea and the gill tracheae divide and 

 redivide inside each gill (PI. Ill, 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 (PI. 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. 19, rdrt, Idrt, rlrt, llrt). 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 



