912 LORD WALSINGIIAM ON THE [XoV. 26, 



which he undertook and continued his studies I could scarcely yet 

 have ventured to work out my present collection. 



In addition to the species named in the following pages a 

 few others may be usefully indicated with a view to their identi- 

 fication by future collectors. I have still a number of living 

 larvae in swelled shoots of Lycium afrum, collected at Puerto 

 Orotava on April 27th. They are white with black heads, and 

 were found on two only of several bushes growing along the 

 narrow track leading eastward from the town along the middle of 

 the rocky, abrupt slopes overhanging the sea. They feed in the 

 interior of the base of the long thorn-like shoots which arise from 

 the main branches, at some distance from the stem, causing them 

 to swell perceptibly, but not distorting them. (Writing on 

 September 1st: ''None have vet changed to pupae, some have 

 died.") 



A larva found at Guimar on April 1st was very long and attenu- 

 ated, of an ivory-white colour, burrowing along the pith in the 

 interior of a stem of Salvia canariensis : this larva was alive a 

 few days ago, but showed no sign of feeding or pupating. 



Another larva, which gave me several days of fruitless work, 

 mines the minute leaflets of Plocama pendula, hollowing them out, 

 and leaving them white and transparent a condition in which 

 they rapidly become shrivelled, when all trace of the larval work 

 is lost, except the little brown, desiccated point of the leaflets. I 

 found unmistakable traces at Santa Cruz, in January, at the 

 Barranco di Honda, between Santa Cruz and Guimar, in February, 

 and again in a small barraiico, close to Guimar, in March, where 

 I secured, at last, one living larva. It was of a very pale amber- 

 yellow, and might have been a Nepticula ; I failed to rear it. 



A larva (possibly a Phycid) burrowing under the woolly clothing 

 of the stems of Phagnalon saxatile is very abundant at Guimar, 

 and was collected at sundry intervals during my stay there in 

 March and April, producing only repeated disappointment. 



During my visit to Tenerife a considerable number of Macro- 

 lepidoptera were collected which have been placed in the hands of 

 others more competent than myself to deal with them ; it may, 

 however, be interesting to mention that I bred a specimen of 

 Eucrostis simonyi Rbl. ( = 0mp/tacodes *divincta Holt- White, nee 

 Wkr.), Geometridae Stgr-Rbl. I. 2899, from a conspicuous red 

 larva found on Frankenia erici folia on the coast near Guimar, 

 6. Ill, excl. 15. IV. 1907. 



I. PTEROPHORINA. 



Being of opinion that in Entomology " A special type must be 

 a zoological entity in its imaginal form " (Merton Rules, 36), on 

 which text a sermon has yet to be preached, I find myself unable 

 to regard as of generic value embryonic characters unsupported 



