TITLES. 
Ins. 51 
he considers that the facetted eye of Iusects must have a different func- 
tion from the eye of the Vcrtebrcita ; this he also supports by a brief 
contrast of their respective structures. The facetted eye he considers 
to be unfavourable for plane perceptions, and that its special advantage is 
appreciation of the third dimension of space — depth. He alludes to the 
origin of ocelli and facetted eyes by evolution from a hypothetical, un- 
developed primitive form, that could be developed in two directions. 
He contrasts the functions of ocellus and facetted eye, and considers the 
ocellus as usually associated with high intelligence. 
490. Nussbaum, J. Struna i struna Leydig’a u owadow. Lemberg. 
Kosmos, 1886, pp. 225-243, pis. i & ii. 
This is a histological paper in Polish, relating chiefly to Lepidoptera. 
[For brief summary, vide J. R. Micr. Soc. 1887, p. 73.] 
. [See also Miall & Denny.] 
491. Obertiiur, C. Etudes d’Eutomologie. Livraison xi. Nouveaux 
Ldpidopteres du Thibet. Rennes : December, 1886, 38 pp., pis. i-vii. 
Numerous new species of Rliopalocera and Ileterocera. 
492. . New Lcpidoptera from Thibet [without special title, scattered 
in Bull. Soc. Ent. Fr. (6) v, pp. ccxxvi-ccxxx, &c.]. 
493. Oertzen, E. v. Yerzeichniss der Coleoptercn Griechenlands und 
Cretas. B. E, Z. xxx, pp. 189-293. 
Includes 3518 species ; 12 page3 are devoted to general remarks and 
some local lists. 
494. Oestlund, 0. W. Entomology. Rep. Surv. Minnesota, xiii, 
pp. 113-123. 
Report on the Insects (chiefly Lepidopterous) injurious to cabbage in 
Minnesota. 
495. . List of the Aphididcc of Minnesota, with descriptions of some 
new species. Op. cit. xiv, pp. 17-56. [ Uliynchota] . 
Includes 2 new genera and mauy new species. 
496. Olivier, E. Etudes sur les Lampy rides, n. Ann. Soc. Ent. Fr. 
(6) vi, pp. 201-246, pi. iii. [ Coleoptera.'] 
This is a monograph of the genus Photuris. 
497. . Larnpyrules nouveaux ou peu connus. Description des 
especes nouvelles rapport^s du Bresil par M. Gouuelle. Rev. d’Ent. 
v, pp. 1-8. [^Coleoptera.] 
1 1 species. 
498. . Larnpyrules nouveaux ou peu connus du Mus6o do Leydo. 
Notes Leyd. Mus. viii, pp. 191-194. [ Coleoptera .] 
499. . Revision du genre Pyroccclia , Gorli. T. c. pp. 195-208. 
[ Coleoptera .] 
Recognizes 22 species, 9 being new. 
[See also Baer (21).] 
