REOKNT NOTES ON HYDROMETRA MARTINI. 175 



Geuus 380. Libk.llula. 



Sp. 1. depressa = Libellula depressa. 

 Genus 381. Cokdulia. 



Sp. 1. senea = CorduUa anea. 

 Genus 382. Cokdulegaster. 



Sp. 1. annulatus = Corduletfastcr annulatm. 

 Genus 383. Go.mi'hus. 



Sp. 1 vulgatissimus = Gouiphus vuh/atissimus. 

 Geuus 384. ^Eshna. 



Sp. 1. grandis = ^l^sckna yrandis. 

 Genus 385. Anax. 



Sp. 1. imperator = Anax imperator. 

 Genus 38G. Agkion. 



Sp. 1. sanguineus = Pi/rrhosuma nymphula. 

 Genus 387. Lestes. 



Sp. 1. autumnalis = Lestes spoitsa. 

 Geuus 388. Caleptekyx. 



Sp. 1. virgO = Calopteryx virgo. 



As the species are not described, it is quite possible that 

 Leach may have had before him other species of some of the 

 genera, than those to which we have referred them, in the case 

 of finuidis, sanguineus, autumnalis, and virgo. 



RECENT NOTES ON HYDROMETRA MARTINI, Kikk. 

 = LINE ATA, Say. 



By G. W. Kirkaldy, F.E.S. 



In the ' Canadian Entomologist ' for March, 1900, an in- 

 teresting "Study oi Hydrometm lineata" (pp. 70-76) has been 

 presented by Mr. J. 0. Martin. Since nothing detailed has been 

 related of the life-history and habits of this genus, I quote freely 

 from Mr. Martin's paper, as the account he has given of the 

 American species refers very probably in great part to our 

 British species also. 



" The insect hybernates in the adult stage, and during the 

 first warm days of spring crawls stiffly out from under the 

 rubbish along the banks, where it has passed the winter. When 

 the weather becomes warm enough (the 1st to 10th of May at 

 Ithaca), egg-laying begins; the female becomes restless, and 

 stalks about in search of a place to deposit an egg. . . . Backing 

 up to a grass-stem or almost any firm object which rises above 

 the water, she exudes from the genital opening a drop of a 

 gummy gelatinous substance, which she then presses against 

 the object which has been chosen to support the egg. This 

 sticky mass is the base of the egg-stalk, and, hardening very 

 soon, fastens the egg in place before it has left the body." The 



