TITLES. 
Ins. 18 
1GG. Dewitz, H. Einige Beobachtungen betreflrend das geschlossene. 
Tracheensystem beim Insecten-larven. Zool. Anz. xiii, pp. 500-504 
& 525-531. 
Relates to the question of open or closed stigmata in the larvae of 
Odonata. 
167. . Haben die Jugendstadien der Libellen and Ephemeriden ein 
geschlossenes Tracheensystem oder nicht ? Leopoldina, xxvi, pp. 
211 & 212. [ Neuroptera .] 
168. Dietz, W. G. Notes on the species of Dendroctonus of boreal 
America. Tr. Am. Ent. Soc. xvii, pp. 27-32. [ Coleoptera.~\ 
1G9. Disque, H. Biologische Notizen uber einige Microlepidopteren- 
Raupen. S. E. Z. li, pp. 56-59 & 85-88. 
170. Distant, W. L. Ethiopian Rhynchota in the collection of the 
Brussels Museum. C.R. Ent. Belg. 1890, pt. i, pp. li— lx. 
171. . Descriptions of Chinese species of the Homopterous family 
Cicadidce. Ent. xxiii, pp. 90 & 91. \_Rhynchota.'] 
172. . Descriptions of some new species of Chinese Rhynchota 
T. c. pp. 159 & 160. 
173. . Description of a new genus of Oriental Cicadidce. Ann. N. H. 
(6) v, pp. 166 & 167. [ Rhjnchota .] 
174. . Description of a new genus of the Homopterous family 
Cicadidce. T. c. pp. 234 & 235. [ Rhynchota .] 
175. . Report on a collection of Rhynchota made at Yambuya on 
the River Aruwimi by Mr. W. Bonny, of the Emin Pasha Relief 
Expedition under Mr. H. M. Stanley. P. Z. S. 1890, pp. 473-479. 
[See also Godman & Salvin (317).] 
176. Dixey, A. On the phylogenetic significance of the wing-markings 
in certain genera of the Nymphalidce. Tr. Ent. Soc. 1890, pp. 89- 
129, pis. i-iii. [ Lepidoptera .] 
Relates specially to Vanessa and its immediate allies, and to Argynnis. 
177. Dognin, P. Diagnoses de Lepidopt&res nouveaux. Le Nat. xxii, 
pp. 10, &c., &c. 
178. Don un, C. A. Paussus silcoranus. S. E. Z. li, p. 82. {Coleoptera.'] 
179. . Madagascarisches. T. c. pp. 195-198. [ Coleoptera .] 
180. Doiikn, II. Zwei noue Paussiden. T. c. p. 1. [ Coleoptera .] 
181. Dokhtouroff, W. Faune Coleopterologique Aralo-Caspienne. 
xm e partie. Meloides et Cantharides ( Mylabrides ). Hor. Ent. Ross, 
xxiv, pp. 121-192, pi. ii. 
This is to be the thirteenth part, when the series is complete. At 
present it is the second parti 
