TITLES. 
Ins . 17 
of the luminous organs. The second part of the memoir gives an account 
of many experiments he made on living insects, describes at great length 
the properties of their light, by means of which he was able to obtain 
photographs; he then considers the influence of mechanical, physical, 
chemical, and toxic agents on the production of the light, and this is 
followed by a chapter in which he discusses the various functions and 
their relations to the luminosity. The vital activity of the luminous 
organs seems to be very similar to that of the muscular system. Pp. 
269-272 give a summary of his conclusions. In addition to the plates 
illustrative of the different parts of the memoir, there is given a photo- 
graph, executed by means of the light of Pyrophorus , of a bust of Claude 
Bernard. [For Summary, vide J. R. Micr. Soc. (2) vi. pp. 595-597.] 
155. Duda, L. Beitrage zur Kenntniss der Hemipteren Fauna Bohmens. 
Wien. ent. Z. v, pp. 15, &C.-262. 
This catalogue of Heteroptera is now completed ; it comprises 495 
species. 
156. DiJGks, Eug. Metamorphoses de quelques Coleopteres mexicains. 
Ann. Ent. Belg. xxx, pp. 27-45, pis. i-iii. 
8 species belonging to several families. [Translated in Nat. Mex. vii, 
. pp. 208-311.] 
157. Dusing, C. Ueber die Farbung und Zeichnung der Thiere. 
Kosmos, xix, pp; 382-393 & 453-463. 
The first part of this relates to Eimer’s studies as to the coloration of 
Lacerta muralis , and is not entomological ; but at p. 392 he enters on a 
consideration of Weismann’s researches on the colours of larvae of Sphin- 
gidce , which he considers support Eimer’s theory. Brook’s theory of 
heredity also is discussed. 
158. Dziedzicki, H. Beitrag zur Fauna der zwciflugeligen Insecten. 
Arten der Gattungen Mycothera , Mycetophila , und Stcegeria. Wien, 
ent. Z. v, pp. 153,- 189, 229, 251, 265, 326, 316, vi, p. 37. [ Diptera .] 
This is a translation from the Polish of portions of a paper that 
appeared in Pamietnik Fizyjog. v, Warschau, 1885. The original memoir' 
was accompanied by five plates, and has not been seen by the Recorder. 
159. Edwards, J. A Synopsis of British Homoptera-Cicadina. Tr. 
Ent. Soc. 1886, pp. 41-129, pis. i & ii. 
Comprises, besides matter of general interest, tables and descriptions 
of the genera and species ; the latter are 120 in number, 50 belonging 
to Liburnia. The plates are devoted to structural details. A seeond 
part will complete the memoir. 15 of the species are not yet known to 
occur outside our islands. 
160. Edwards, H. Notes on North American Zygcenidoe and Bombycidce , 
with descriptions of new forms. Ent. Am. ii, pp. 8-15.- [Lepido- 
ptera.~\ 
18 new species and a few varieties and remarks. 
161. . Apparently new forms of North American Heterocera. T. e. 
pp. 165-171. [ Lepidoptera . ] 
12 species and some varieties. 
