CHilMISTRTJ Of INSfidT COLOttlgi ]6S 



remains at the top of the hill. Of Gonepteryx rhamni I saw only 

 one male on the banks of the Darro in the outskirts of Granada, 

 and one female near the Sella del Moro, but failed to capture 

 either. I was credibly informed that two or three G. cleopatra 

 could be taken a day, at a place nine miles from Granada by 

 following up the course of the Genii, famed for its numerous 

 gentians, fields of forget-me-nots, and wild peonies. One notice- 

 able particular, in respect of the flora of Andalusia, is the number 

 of our well-known garden flowers that flourish perfectly wild in 

 Southern Spain. 



As regards Heterocera, one of the commonest and certainly 

 the largest species was Saturnia pyri, of which I had several 

 specimens offered me, some of them by the guards of the 

 Alhambra, and could doubtless have had many more. 



Diptera did not seem to be common, one or two kinds of 

 Eristalis alone excepted. Genera Syrphus and Tahanus were 

 noticed, but by no means in abundance. 



Among Hemiptera the frequent occurrence of Lygceus mili- 

 taris, familiar to the traveller in Syria and Palestine, may be 

 mentioned. 



In the class Orthoptera, Gryllotalpa vulgaris ; and such grass- 

 hoppers as were seen (principally Decticus, sp. incert., Mantis 

 religiosa), had, of course, as yet their wings mostly undeveloped. 



At Tangiers, on Wednesday, June 3rd, I succeeded in catching 

 nine Satyrus meone between 8 and 10 a.m. ; also specimens of 

 Silpha and Scarabceus sacer. Locusts, mostly dead, but a few still 

 living remnants of the recent plague, whereby the crops were 

 destroyed, were to be met with in the hedgerows (Acridium pere- 

 grinus) . 



At Gibraltar, June 4th, one specimen of S. meone. 



(To be continued.) 



CONTRIBUTIONS to the CHEMISTRY of INSECT COLOURS. 



By F. H. Perry Coste, F.C.S., F.L.S. 



(Continued from p. 139.) 



V. — The Chemical Aspect (concluded). 



K. 



Addendum, on experiments with the Cyanide Ee action.* 



Before commencing my remarks on the Biological Aspect, 

 I must redeem the promise to detail my further experiments 

 with C. edusa and the cyanide bottle. To refresh the memory of 



* It will be understood, as already stated, that this subsection was originally 

 WTitten for a footnote to the December issue of the ' Entomoloi'ist.' 



