158 ME. E. m'lachlan on the neueopteea op 



and there can, I tliink, be little donbt that it pertains to the 

 same insect. The cases are cylindrical slightly curved tubes 

 formed of coarse sand-grains, 14-15 mm. long, the diameter at the 

 mouth-end about twice that at the tail-end. The larva has a 

 black head and thoracic segments, and dull greenish abdomen ; 

 legs testaceous : it is of the true Limnophiliform type. The 

 temperature of the water where they were found was 51° Eahr. 



The type form of aspersus is essentially a South-European spe- 

 cies, and especially given to concealing itself in caves. A much 

 larger and much paler form is found further north, and is not 

 uncommon in some localities in Switzerland &c. 



Mesophtlax oblittjs, Hagen. {StenopJiylax o5Z^YMs, Hag. Ent. 

 Month. Mag. ii. p. 76 ; Stett. ent. Zeit. 1865, p. 217 ; M'Lach. 

 Eevision & Synopsis, p. 115, pi. xiii.) 



Madeira (Wollaston). 



In my ' Eevision and Synopsis,' p. 116, 1 called attention to the 

 minute condition of the spur on the anterior tibiae of the <S , but 

 had not then noticed that S. aspersus was precisely in the same 

 condition. I now see that there is close relationship between 

 oblitus and aspersus. The contour of the anterior wings of the 

 former is considerably different, and so are the anal parts at first 

 sight ; but closer examination shows that the latter can be quite 

 homologized with the same parts in aspersus ; the bifid middle 

 lobe of the vulvar scale of the ? is another point of resemblance. 

 There is, however, no specific connection whatever between the 

 two species. 



Htdeopstchid^ . 



Htdeopstche madeeensis, Sag en (Enfc. Month. Mag. ii. 

 p. 77, Stett. ent. Zeit. 1865, p. 219 ; M'Lach. Eevision & Synopsis, 

 p. 367, pi. xxxix.). 



Madeira {Sartung, WollasUn). Grenerally distributed about 

 streams in November, especially in the north of the island 

 {Eaton). 



Eaton brought a dozen examples of both sexes, varying much 

 in size and in intensity and variety of markings. Apparently a 

 truly endemic species, of which the nearest European ally is 

 probably H. angustipennis, Curt., notwithstanding the colour- 

 differences. 



PoLTCENTEOPTJS FLAYO-STiCTTJS, Hagen (Ent. Month. Mag. 



