150 Miscellaneous . 



cystiae is soon divided by a septum, and if at this moment it did not 

 rise above the epidermis, it would be impossible to say decidedly 

 "whether it was a cystia or a spiracle in course of development. But 

 afterwards the two cells of the cystia each divide into two others, 

 forming four cells, which by a further subdivision are converted into 

 the eight elements composing the perfect organ. 



All the stomata of the lower surface of the leaves, and those of the 

 stalk, give place in this manner to cystise, whilst the transformation 

 only takes place in the minority of those placed on the upper surface 

 of the leaves. Thus nature makes use of an organ already existing to 

 form a new apparatus. — Comptes Rendus, 18th June 1855, p. 1291. 



Description of a new Tanager of the Genus Calliste. 

 By Philip Lutley Sclater, M.A. 



Calliste venusta, Sclater. C. Icete caeruleo-mridis : intersca- 

 pulio aJis caudaque 7iigris, eodem viridi limbatis : fronte, loris, 

 yuJa summa et auchenio nigris : pileo lateribusque capitis Jlavis : 

 ventre medio crissoque pallide ochraceis : rostro nigro : pedibus 

 pallidis. 



Long, tota 4*5 ; alse 2*5 ; caudse 1*5 poll. Angl. 



Hab. In Nova Grenada et in rep. Equatoriana provincia Quixos. 



I have been acquainted with this pretty Calliste for some time, 

 but have always considered it as the ocanthocephala of Tschudi, and 

 have described it as such in my ^* Synopsis of the genus Calliste^^ in 

 the Contributions to Ornithology. But having lately had the oppor- 

 tunity of examining Tschudi' s type specimens in the Neuchatel Mu- 

 seum, I find that his Callospiza xanthocepTiala is not this bird, but 

 the same as my Calliste lamprotis (Cont. to Orn. 185 1 , p. 65). That 

 species closely resembles the present, but may be distinguished by its 

 orange cap and brilliant golden-yellow ear-coverts. 



The extreme inaccuracy of Dr. Tschudi' s figure, which looks more 

 like this species than the other, must be my excuse for committing 

 this error, in which however I am not alone, as even in the Berlin 

 Museum (where Tschudi' s types ought to be known) I have observed 

 the present bird called ocanthocephala. 



Mr. Gould's collection from Quixos contained examples of this 

 species. My own specimens are from Santa Fe di Bogota. — Proc. 

 Zool.Soc, Nov. 14, 1854. 



On the Spermatophora of the Crickets. By C. Lespes. 



In the Crickets the ejaculatory canal does not turn back as in 

 nearly all insects to form the penis. During copulation, which is 

 accompanied by some singular manoeuvres, the male introduces into 

 the vulva of the female the extremity of a small apparatus which 

 contains a drop of the seminal fluid. This spermatophore consists of 

 a small horny vesicle, and of a slender, flattened appendage ; the 

 latter is the only part tliat penetrates into the vulva. In the course 

 of a few hours the female drops the whole apparatus. 



As soon as the male has lost one of these spermatophora, a new 



