54 Dr. A. E. Feoktistow on the Physiology of the 



Odoiitorhopala. Pamhrachyte.'i. 



Prondtuin with the Internl anjrles Pronotmn with the hxteral angkis 



produci'd in foliaceous lobes. inoileiately prominent and angu- 



larly roiiiidea. 

 Abdomen strongly and abruptly Abdonit-n moderately and regu- 



dilated, especially at the fourth larly dilated in both sexes. 

 segment in both sexes. 



First joint of the antennas longer First joint of the antennae shorter 



than the second. than or subequal in length to the 



second. 



Other points of difference, but of a minor nature, are to be 

 found in the structure of the incrassated apices to the .second 

 joint of the antennae. 



I am now able to add tlic description of wliat appears to be 

 a second species to the genus Odontorhopala. 



OJoTitorhoj)aIa Bergrothi, sp. n. 



^ . Allied to 0. caUosa, Stal, but differing* from the 

 description of that species bj the following characters : — 

 The clavus is not black, but concolorous with the coriuui ; 

 the second joint of the antcnnai is not black, but is ochra- 

 ceous, with the apical incrassated portion only black, and the 

 sixth as well as the fifth segment of the abdomen is outwardly- 

 toothed. 



Other characters not mentioned by Stal are as follows: — Tlie 

 pronotum, clavus, and corium arc not only coarsely punctate, 

 many of the punctures being black, but tlie lateral expanded 

 angles of the pronotum are ornamented with small black 

 tubercles on their upper surface which are continued in a more 

 obsolete manner across tlie disk. The spinous tubercles to 

 the femora and first joint of the antennaj are pale greyish in 

 hue. 



Long. 20 millim. ; max abd. exp. 10 millim. j exp. pronot. 

 angl. 10 niillini. 



llah. ^ladagascar, Fianarantsoa. 



XIV. — Oh the Physiology of the Battle o/*Crotalus durissus. 

 By A. E. Feoktistow, Al.D.* 



In June 1887 I received ten living specimens of Crotalus 

 durissus, whicli 1 have since been able to observe closely. 

 Owing to want of a sufficient quantity of suitable food (the 



♦ Tran.'^lated from the * Mi5langes Jiiologiques tirtJs du ]5ulletin de 

 TAcademie Impdriale des Sciences de St. l'6ter.'«bourg,' t. xiii. livraison 1, 

 pp. 1-4 : St. P6tcrjibourg, 1891. 



