MADEIEA AND THE CANARY ISLANDS. 157 



in the Madeiran form ; and perhaps the intermediate appendages 

 of the c? are slightlj^ longer and less curved. 



Mesophtlax, n. g. { = Steno2)TiylaA\ Kol., partim). 



Very closely allied to StenoplyJax typically ; differs especially in 

 the spur of the anterior tibise of S being so much reduced as to be 

 microscopic, whereas the corresponding spur in the ? is long ; 

 hence the spur-formula is quasi 1,3,4 6", and 1, 3, 4 $ ; but the first 

 joint of the anterior tarsi in the S is as long as in the $ . As 

 other differences, it may be said that the palpi are more slender 

 than in Stejiophylax typically, the pronotum more developed, the 

 median lobe of the vulvar scale notched or bifid. 



The type of this genus is StenopJiylax aspersus, Eambur. "When 

 I wrote my ' Revision and Synopsis of European TrichojDtera,' I 

 had not noticed the peculiarity in the spur of the anterior tibiae of 

 the (S , and therefore placed aspersus in the typical group (vide 

 Eevision and Synopsis, p. 114) of Stenophylax. Eenewed exami- 

 nation proves that this spur is virtually obsolete : it can only be 

 detected microscopically, and when the tibia* are in a particular 

 position ; the basal joint of the tarsi, however, is not at all 

 abbreviated. 



The Madeiran StenopJiylax ollitus, Hageu, will fall into the 

 same genus. 



Mesophtlax aspeesus, Bambur, var. canaeiensis {M^Lach.). 



Canaries : hills beyond San Mateo, Grand Canary, at a stream, 

 4550-4650 feet, 11th December {Eaton, 2 6). 



The most remarkable feature in these Canarian examples is 

 their very small size; expanse, 6, 22-25 mm. (instead of 

 31-33 mm. in the typical form*). Upon comparing them, they 

 appear to be identical in form and colours, and also in anal struc- 

 ture so far as this can be defined ; but the superior and interme- 

 diate appendages cannot be examined in these dry individuals. 

 The locality and altitude at which the examples were found prove 

 that the form is a true native. In the absence of any obvious 

 structural differences it w^ould be rash to consider it a species ; 

 but it may justly be placed as an insular race. 



Having made this unexpected discovery, Mr. Eaton, as is his 

 custom, at once searclied the stream for larvse or cases, and suc- 

 ceeded in finding the larval condition of one of the Limuophilidae ; 

 * I have seen, however, a c? of M. aspersus from Spain in -nliicl] tlie expanse 

 is only 26 mm. 



