TITLES. 
Ins. 75 
740. [Will, L.] Oogenetische studien. . i. Die Entstehung des Eies 
von Colymbetes fuscus , L. Op. cit. xliii, pp. 328-368, pis. xiii & xiv. 
741. Williston, S. W. Diptcrological notes and descriptions. Tr. Am. 
Ent. Soc. xiii, pp. 287-307. 
22 new species, and 1 new genus of flies of various families from N. America. 
742. . Catalogue of the described species of S. American Syrphidce. 
T. c. pp. 308-324. [ Biptera.'] 
Includes about 300 species and 41 genera. 
743. . On two interesting new genera of Leptxdw. Ent. Am. ii, 
' pp. 105-108. \Diptera .] 
North American, one being also new species. 
744. ^Wingelmuller, K. Das Anlegen von Kafer- und Schmetterlings- 
samlungen. Mit 32 Abbild. Magdeburg : 1885, 112 pp. [c/. Zool. 
Anz. ix, p. 155]. 
745. Witlaczil, E. Zur Morphologie und Anatomie der Gocciden. 
Z. wiss. Zool. xliv, pp. 149-174, pi. v. [ RhyncJiota .] 
i. Die Verwandlung der Cocciden : describes and figures the metamor- 
phoses from observations made on A spidiotus nerii , zonatus , and Leucaspis 
jrini, dealing with the various stages, and concludes that the metamorpho- 
sis, though not a complete one, is an incomplete, approximating very 
nearly to a complete, one ; discusses Schmidt’s paper (Arch. f. Nat. li) 
on the development of Aspidiotus nerii. II. Haut Absonderungen. 
Bildung des Riickenschildes der Cocciden : brief remarks on the wax 
glauds and structure" of the dorsal shield. III. The tracheal system ; a 
few details on, and figures of this. iv. A contribution to the know- 
ledge of the sexual organs and their development, pp. 162-166; gives 
some information and figures of the internal soxual organs of both sexos, 
in different stages of the development, v. Brief remarks on the nervous 
system, brain, suctorial and digestive apparatus. VI. Tracheal system of 
the Chermciides ( Chermes abietes and Phylloxera quercus ). vii. The 
sexual organs of Chermetides. vm. Brief observations on the nervous 
and nutritive systems of species of Chermetides. [For summaries, vide 
J. R. Micr. Soc. (2) vi, p. 433, and Am. Nat. xx, pp. 557 & 558.] 
746. . Der Saugapparat der Pliyptophthircs. Zool. Anz. 1886, 
pp. 10-12. [ Rhynchota .] 
An explanatory note as to certain supposed discrepancies between the 
writer and Wedde and other authorities ; pointing out the existence in 
certain Rhynchota of two separate sets of apparatus for the purpose of 
imbibition. 
747. [Witlaczil, E.] Die Ausbeute des “ Pisani” an Halobates wahrend 
der Erdumsoglung 1882-1885. Wien. ent. Z. v, pp. 177-182 & 
231-234. [ Rhynchota .] " _ 
Gives much information, in addition to the description of 2 now species. 
748. - Wood, T. 'On Bruchus - infested Beans. Tr. Ent. Soc. 1886, 
pp. 375-380. : : 
Experiments to ascertain to what extent the germinative power of the 
beans infested was deteriorated. 
1886 . [vol. xxiii.] 
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