194 REPORT OX ZOOLOGY, MDCCCXLIII. 



THYSANURA. 



A compilation of the more recent systematic works on this order, parti- 

 cularly of those by Nicolet and Bourlet, has been undertaken by Lucas. 

 (Ann. d. 1. Soc. Eut. d. Fr. ser. i, p. 2G9.) Since the papers by Bourlet, hi 

 the ' Memoirs of the Agricultural Society of Lille and the Dept. du Nord,' 

 did not come into my hands in time for this Report, I will here give the 

 synonymy of the genera as it has been settled by Lucas. I. PODURIDES. Bourl. 

 (1) Tomocems, Nic. 1841 (Macrotoma, Bourl. 1839, there is a Coleopterous 

 genus of the same name.) (2) Lepidocyrtits, Bourl. -(3) Orcfiesella, Tempi. 

 (lleterotoma, Isotoma, JElheocerus, Bourl. (4) Podura, Auct. (Isotoma, Bourl.) 

 (5) Desoria, Nic. (6) Cyphoderw, Nic. (7) Deyeeria, Nic. (Isotoma, Podura, 

 Bourl.) (8) Achorutes, Tempi., Nic. (Hi/pogasfmra, Bourl.) (9) Lipura, 

 Burm. (Amirophorus, Nic., Adicanits, Bourl.) With respect to the last 

 genus the author remarks, that it is formed, according to TVaga, of unde- 

 veloped individuals of Achorutes. II. SMINTHURIDES, Bourl. (10) Smin- 

 thurus, Latr. (11) Dicyrtoma, Bourl. (1842). 



Another memoir on the Thysanura, which is based upon the above- 

 mentioned researches of Nicolet and Bourlet, has been published by 

 Gervais in the ' Hist. nat. d. Insectes Apteres,' par. MM. Walkenaer and 

 Paul Gervais, iii. p. 379, in which the following genera and subgenera are 

 admitted : I. Smiiithunis, Latr., with the subgenns Dieyrtosoma, Bourl. II. 

 Podura, with the subgenera : (1) Macrotoma, Bourl. (Tomocems, Nic.) (2) 

 Lepidocyrtits, Bourl. (CypJioderus, Nic.) (3) Orchesella, Tempi. (Heterotoma 

 and SEtheocerus, Bourl.) (5) Isotoma, Bourl. (Desoria and J)egeeria, Nic.) 

 (f5) Achorutes, Tempi. (Hi/pogastrurus, Bourl., Podura, Nic.). (7) Lipura, 

 Burm. (Amtrophorus, Nic., Adicranus, Bourl.) (8) Anoura, Gerv. (Acho- 

 rutes, Nic.) 



PARASITA. 



A memoir on this order, of the size of a manual, has 

 been published by Gervais, in the ' Hist. Nat. des Ins. 

 Apteres, iii. p. 290-361. 



