ORTHOPTERA. 
389 
14. Baetis (Leacli) : type E. hioculata (Linn.) ; of sections, E. luteola 
QA.n\\.) = translucida (Piet.) and B. tristis (Hag.). 
16. Bcdisca (Walsh) : typo B. ohesa (Say). 
16. ColohuruSy g. n. : type Pal. humeralis (Walk.). 
17. Siphlonurus, g. n. : type B.Jlavida (E. Piet.). 
18. Hepiagenia (Walsh) (Eat.) j types of sections 
(Walsh) and E. venosa (Fab.). 
These genera are considered by the author to form 4 groups or alliances as 
follows : — 1. genera 1-| ; 2. genera J-9 j 3. genera 10, y-14 ; 4. genera 
y, 16-18. The genera indicated fractionally appear to enter partly into two 
groups. The author finally explains the terminology of the wings and their 
venation employed by various authors. 
Eaton (Trans. Ent. Soc. Lond. 1868, pp. 279-282) describes the structure 
of the immature state of Ccmis macrura (Steph.) and discusses the relation- 
ships of this species. 
Oligoneuria trimeniana, sp. n., M^Lachlan, Ent. M. Mag. iv. p. 177, Natal. 
Perlidas. 
Laboulbene states that Neniura nehidosa bears a quantity of glutinous 
matter at the extremity of the abdomen, and that this consists of a mass of 
minute eggs ; also that when specimens of Perla parisina (Ramb.) are laid 
upon their back they often remain perfectly motionless, when a yellowish 
liquid is emitted by them between the joints of the legs. Bull. Soc. Ent. Fr. 
1868, p. XXX vii. 
Orthoptera genuina. 
ScuDDER has published a very complete catalogue of the North- American 
Orthoptera genuina (see p. 382). 
ScuDDER publishes (American Naturalist, ii. pp. 113-120) a paper on the 
stridulation of the Crickets, Locusts, and Grasshoppers. He indicates the 
different modes in which their sounds are produced, and figures the wing- 
cases of the 3* and ^oiCEcanthus niveus (/. c. p. 116, figs. 1, la), Phaneroptera 
curvicauda (I. c. p. 117, figs. 2, 2a), and Arcgptera lineata {1. c. p. 118, figs. 3, 
3a), the latter accompanied by an enlarged figure of the stridulant portion of 
the wing-case. Scudder also indicates by musical notation {1. c. pp. 119, 
120) the song of these and some other species. 
Boisduval (Ent. Ilortic. pp. 195-216) describes the general structure 
and habits of the insects of this group. His account of them is very scanty 
and imperfect. 
Dietrich publishes a list of the species of this group inhabiting the canton 
of Zurich (Mitth. schw. ent. Gesellsch. ii. pp. 327-332). He enumerates in 
all 30 species, namely 3 ForJiculcBy 2 Blattmy and 1 Periplaneta, 1 Gryllotalpay 
and 2 Grylli, one of each of the genera Odontnra, Phaneroptera, Xyphidium, 
Locusta, and Thamnotrizon, 4 Dectici, 7 Stenohothri, 1 of each of the genera 
Mecostetlius, Caloptenus, and (Edipoda, and 2 species of Tettix, 
Ruegger publishes a list of Orthoptera from the valley of the Leman 
(Bull. Soc. Valid. Sci. Nat. ix. pp. 648-661). He enumerates 68 species 
belonging to 26 genera and distributed as follows under the different fa- 
milies : — Forficulina 6, Blattina 3, Mantodea 1, Gryllodea 6, Locustina 14, 
Acridiodea 38. 
