PROGRESS OF OUR KNOWLEDGE OF THE ODONATA. 9 



published an exhaustive criticism in the Hoiiner Enfowolofiische 

 Zcitschn'ft, vol. xxxiii (1890). Libellulidae. — Cordidinac . — On this 

 and all tlie following subfamilies Baron de Selys-Long'champs has 

 published a series of monographs, either alone or in combination with 

 Dr. H. A. Hagen, either as independent works, or more frequently, in 

 various Belgian periodicals. As regards the Cordulinac, an abstract 

 appeared in the ( 'o»/y;f('.s- llendns de la Societe EntomoUxjique de lU'hjc, 

 for November, 1870, and in the following year (1871) he published a 

 " Synopsis des Cordulines " in the Bidlctiii de VAcademie de Jjch/iqiw., 

 ser. 2, vol. xxxi., and two series of additions in the same journal (ser. 

 2, vols, xxxvii., and xlv., 1874 and 1878 respectively). JiIshnidae. — 

 Gomplnnae. — In 1854, Baron deSelys-Longchamps published a " Synop- 

 sis des Gomphines," Bull. Acad. Beh/., vol. xxi., pt. 2, which was 

 followed, in collaboration with Dr. Hagen, by a " Monographie des 

 Gomphines," in the Menioires dc la Societe des Sciences de Lihjc, vol. Ixi, 

 and by several series of "additions" in Bidl. Acad. Beh/., ser. 2, vol. vii 

 (1859) ; (2) xxviii (1869) ; (2) xxxv and xxxvi (1873) ; and (2) xlvi 

 (1878). tEshnidae. — Ji,Achninae. — One of the principal works on this 

 subfamily is a "Synopsis des ^Eschnines" by Baron E. de Selys-Long- 

 champs in Bull. Acad. Bel;/., (3) , vol. v (1883) . It is a revision of genera and 

 subgenera, but has not yet been supplemented by a synopsis of species. 

 Agrioxidae. — Ai/rioninae. — Baron de Selys-Longchamps published a 

 " Synopsis des Calopterygines " in Bull. Acad. Beh/., for 1853-1854 ; 

 and a " Monographie des Calopterygines " (in conjunction with Dr. 

 Hagen) in J//'))?. Soc. Scl. Lik/e, ix (1854). "Additions" have also 

 appeared in Bull. Acad. Bel;/. {2), vii (1859) ; (2), xxvii (1869) ; (2), 

 xxxv and xxxvi (1873); and (2) xlvii (1879). Agrionidae. — t'oena- 

 ;/yioninae. — The second subfamily of A;/rionidac is divided by Baron 

 de Selys-Longchamps into " Legions " and what he calls " Grand 

 genres," Avhich are really sections treated as large genera, and divided into 

 genera and subgenera. All these have been fully monographed by him in 

 a series of papers in Bull. Acad. Bel;/, as follows : — S!/nopsisdesA;/riomnes, 

 Premiere legion, Pseudo!<ti;/ii>a (2), x (1860); Derniere legion, Protnitcnm 

 (2), X (1860); Seconde legion, Lestes (2), xiii (1862); Troisieme legion, 

 Poda;/nnn (2), xiv (1862); Quatrieme legion, Platycneuiis (2), xvi (1863); 

 Cinquieme legion, A;/rion : Grandes genres — An/ia (2), xx (1865) ; 

 Af/rinn (2), xli, xlii (1876); Telebasis, Air/iocneuiis, Hei)iiphlebia (2), xlni 

 (1877). A revision subsequently appeared in the 8vo. series of Meuioires 

 L'ouronnees, xxxiii (1886). 



Works relating to European Odonata. — The following Avorks 

 are the most important which have appeared relative to the European 

 odonata as a whole : — In 1825 \xiis])\\hhsh.edMojwi/raphiaeLibellulinarum 

 Kurojiaearum Specimen auctore . P. L. Vander Linden (Bruxelles), 

 pp. 42. The total number of species described is 37, distributed under 

 8 genera as follows — Lihellula, 14, A'lshna, 11, Ai/ium, 12. In 1840, 

 three very important works appeared — (1) LibelluUnac Enropaeae 

 descriptae ac depictae, a Toussaint de Charpentier. Cum tabulis xlviii 

 coloratis. 180pp. (Lipsiae). — This is a handsome quarto volume, in which 

 60 species are described and beautifully figured, somewhat above life- 

 size. {2)Sipwn]/nna Libellularum Eumpaearnin. Dissertatio inaugurahs. 

 Auctor H. A. Hagen, pp. 84 (Regimontii Prussorum). — Seventy-eight 

 species are here enumerated, with full synonymy. (3) Zlnnoi/rajdv'e 

 flea LiheUulidees d' Europe, parEdm. de Selys-Longchamps, pp. 220, pi. 4 



