PERL1D;E — ODONATA. 
457 
vious publication on the presence of external tracheal organs in this 
family {cf. Zool. Rec. x. p. 435), by a recapitulation of what has been 
pul>lishc(l on the subject. lie concludes that in those species which, in 
the larval state, possess prostornal gills, these latter are present also in the 
perfect insects, and in the same number, form and position. His observa- 
tions especially concern a species of Nemoura, which he considers to bo 
N. lateralis^ Piet. In this, he proves the existence of three oval gills on 
each side of the prosternum in the perfect insect, homologues of those 
that exist in the insect in its sub-aquatic condition. These gills are each 
traversed by a main branch of the internal, trachea, with subsidary rami- 
fications. The paper concludes with a detailed account of the external 
anatomy of the species, more especially with regard to the formation of 
the genital parts in both sexes, and is illustrated by a plate (xxiii.) with 
beautifully executed figures illustrating all the principal points touched 
npon in the paper. 
EPHEMERIDiE. 
JoLY, Emile. Note sur les caracteres d’uae larve d’insectes Orthoptcres 
de la famille des Ephemdrines. Rev. Soc. sav. (2) iii. [The Re- 
corder has seen only a separate copy, pp. 1-8.] 
Treats on a larval form found at Toulouse, the chief peculiarity of 
which is that the respiratory organs are protected by two trapezoidal 
lamellae of singular structure. He refers it doubtfully to Ccenis. 
Odonata. 
Haorn, H. a. The Odonato Fauna of Georgia, from original drawings 
nowin the possession of Dr. J. Leconte, and in the British Museum, 
r. Best. Soc. xvi. pp. 349-305. * 
A list of species (chiefly Odonata) collected at Grimsby, Ontario, is giveu 
by Pettit in Canad. Ent. vi. p. 45. 
Spaonolini (Bull. Ent. Ital. vi. pp. 31-37) gives a list of 25 spp. 
from Modena and (pp. 38-42) of 10 spp. from Leghorn. 
De Selys-Longciiamps publishes a list of 20 spp. observed by him at 
Maescyck in Belgium, in CR. Ent. Bulg. xvii. pp. cv. & cvi. 
Oorduliina. 
Selys-Longciiamps, E. de. Additions au Synopsis des Cordulines, 
Bruxelles : 1874, pp. 1-24. Also in Bull. Ac. Belg. (2) xxxvii., but 
only the separate form has been seen by the Recorder. 
The number of known species is elevated to 91, and descriptions are 
given of previously unknown sexes. Macromia whitci^ Selys, = cingulata^ 
Ramb., and the locality for cingulata is Bengal, not North America, 
p. 14. The following new species are described : — 
Epitlicca nasalis, p. 10, North America. 
Gom^diomacromia volxenii, ibid., Brazil. 
Macromia magnifica (McLachlan), p. 11, California, loeskooodi, p. IG, 
Penang, moorei, p. 17, Himalaya. 
Synthemis regina, p. 20, Queensland, virgula, p. 22, Melbourne. 
