THE CANADIAN ENTOMOLOGIST 115 



oddities (husband and wife, as sure as antennal measurements 

 could make them) captured at Chemong on July 2nd. 



I then subjected them to a careful scrutiny with the specific 

 description before me. Point for point, they coincided throughout. 

 The only thing debatable was the "deep fovea" behind the scutel- 

 lum; if "behind" meant further from the base, there was no cavity 

 there; I focused the insect under a two-inch objective in the micro- 

 scope, and after some trouble succeeded in touching the centre of 

 this so-called pit with the point of a fine needle mounted on a 

 pen-holder; as soon as the needle point came into focus the insect 

 was jarred into a blur, and when the vibration ceased there was 

 the needle-tip still in focus and resting on the centre of the black 

 spot; it was no fovea, but a tiny patch of jet-black pubescence 

 on a level with the snow-white scutellum. 



To the best of my belief, then, on July 2nd, 1917, besides 

 capturing over a score of Hoplosia nuhila, I had taken two speci- 

 mens of this great rarity Gonotropis gibbosus, specimens, moreover,, 

 that by a unique stroke of luck formed a natural pair, male and 

 female. If it never rains but it pours, assuredly on this date, in 

 the quaint parlance of GeolTrey Chaucer, it fairly "snewM" of 

 good things. 



A TIPULID FLY FROM BALTIC AMBER. 



BY T. D. A. COCKERELL AND GRACE E. CLARK, BOULDER, COL. 



In Canad. Entoni., 1915, p. 159, it was remarked that some of 

 the Mycetophilidae had remained without evolutionary progress 

 in about a million years, exhibiting merely minor changes or the 

 shuffling of characters, producing closely related species. The 

 Baltic amber is probab'y twice as old as the Florissant shales, and 

 yet, in spite of the great age of' the specimens, dating back to 

 Oligocene times, we find that many of the species dififer little from 

 those of to-day. Such, for instance, is the Tipulid fly now de- 

 scribed. It presents an assemblage of characters which permit its 

 recognition as a species; but we cannot say that it is more primitive 

 or archaic in appearance than its descendants or representativ'es 

 living in the same region at the present time. 



Limnophila electrina, n. sp. 



Male. — Bodv and legs dark reddish brown, thorax decidedly 



April, 1918 



