Vol. XXVl] ENTOMOLOGICAL NEWS. 447 



IBID. 1886. Cenno Monografico degli Odonati del Gruppo Ischnura. 

 L. c, xviii, pp. 239-258, tav. ii-vi. 



IBID. 1888. Contribute allo Studio delle Forme Larvali degli Odonati. 

 Cenno Iconografico della Larve-Ninfe dei Caudobranchiati. L. c. xx, 

 pp. 159-170, tav. i-iv. 



ROUSSEAU, E. 1909. Etude Monographique des larves des Odonates 

 d'Europe. Ann. Bin!, lacustre, iii, pp. 300-366, 47 text figs. 



SCHMIDT-SCHWEDT, E. 1891. Kerfe u. Kerflarvcn d. siissen Wassers, 

 besonders der stehenden Gewasser. In Die Tier. u. Pflanzenwelt d. 

 Stisswasscrs von Dr. Otto Zacharias, Bd. II, pp. 51-122. Leipzig, J. J. 

 Weber. 



SHARP, D. 1895. Insects. Tbe Cambridge Natural History, v, pp. 

 422 et seq. London and New York. Macmillan & Co. 



SUC.KOW. 1828. Respiration d. Insekten, insbesondere iiber die 

 Darmrespiration der Acschna grandis. Zcitschr. organ. Physik. (Eisen- 

 ach), ii, pp. 24-49, tab. i-iv. 



TILLYARD, R. J. 1906. Life History of Lcstcs Icda. Proc. Linn. Soc. 

 New South Wales, xxxi, pp. 409-423, 2 pis. 



IBID. 1909. Studies in the Life-Histories of Australian Odonata. II. 

 Life-History of Diphlcbia lestoides. L. c. xxxiv, pp. 370-383, pi. 

 xxxiii. 



TUMPEL, R. 1898-99, 1908. Die Geradfliigler Mitteleuropas. [Two 

 editions, ist, Eisenach, Verlag von M. Wilckens ; 2nd, Gotha, F. E. 

 Perthes. I have used the 2nd.] 



WIUJAMS, T. 1854. On the Mechanism of Aquatic Respiration and on 

 the Structure of the Organs of Breathing in Invertebrate Animals. 

 Ann. & Mag. Nat. Hist. (2) xiii, pp. 180-200, pis. ix-x. [Brief note 

 on "extreme degree of capillary subdivision" of the tracheae in branchiae 

 of Agrionidae, p. 196; his fig. 6, pi. ix appears, however, to be that of an 



Ephemerid larva.] 



OTHER PAPERS CITED. 



OUSTALET, E. 1869. Note sur la respiration chez les nymphes des 

 Libellules. Annales d. Sciences Naturcllcs (5) Zoo/, xi, pp. 370-386, 



pis. IO-I2. 



SCOTT, G. G. 1905. The Distribution of Tracheae in the nymph of 

 Flathcmis Jydia. Biol. Bull. (Wood's Hole) ix, pp. 341-354- 8 text- 

 figures. 



i < 



Destructive Grasshoppers in Costa Rica (Orth.). 

 Senor Anastasio Alfaro, Director of the Museo Nacional of Costa 

 Rica, has described the invasion of Costa Rica by locusts in the pres- 

 ent year in Rcrista de Education, San Jose, Oct., 1915. The species 

 concerned, identified by Mr. J. A. G. Rchn, are Schistoccrcn paraucn- 

 sis and S. zapoteca, the former predominating. The invaders entered 

 from the north in two columns, one along the Pacific lowlands, the 

 other along those of the Atlantic. A detachment from the latter col- 

 umn crossed the mountains by the Rio San Carlos and Zarcero into 

 the province of Alajuela. Previous locust years in Costa Rica were 

 1659, 1731, 1774, 1800, 1852 and 1876. 



