THE CANADIAN ENTOMOLOGIST. 311 



more males ; at first this suggests that a specific odor may also play a 

 part in the attraction, but the observations of Mast (ante) are opposed to 

 this view, as are also those of Emery (see the writer's second paper). The 

 presence ofthese extra males is probably accounted for by the attraction of 

 several males before actual mating, as females of Photinus do not appear 

 to flash while coupled, unless disturbed. 



P. marginellus and P. castus also differ in their conduct in the late 

 evening ; margindlus cf continues to flit around the vegetation for a long 

 time, thus resembling P. schitilla?is, while the castus o^ flies aimlessly 

 high above the vegetation after the time of maximum activity, thus more 

 closely resembling the habit of P. pyralis. 



Riley a (Lucidota)* air a Oliv. — The first specimen of this species 

 taken this year was a larva, found in a decayed stump at Niagara Falls, 

 N. Y., on May 6th. This glow-worm was kept alive and subsequently 

 developed, the imago proving to be this species. The adult was but 

 faintly luminous, and for only a very little while after emergence, and no 

 excitation produced light-emission during the remainder of the time (about 

 a week) that it was kept alive. Subsequently several adults of this species 

 were taken in flight in the daytime in July, near Sharpsburg, Pa., and in 

 no instance was there any indication of luminosity. All specimens taken 

 were apparantly males. The luminous apparatus of the adult is repre- 

 sented by two small brownish scales on the last segment of the abdomen ; 

 the larva was quite as luminous as that oî Photinus pyralis, which it much 

 resembled. The reared adult, with its larval and pupal skins, is deposited 

 in the U. S. National Museum. 



Rileya ( Lticidota) punctata Lee. — This species closely resembles the 

 foregoing, but is only about 3/5 as long. Both sexes were taken in flight 

 in the daytime, in woods near Sharpsburg, in July, and neither showed 

 any indication of luminosity, although the brownish scales representing the 

 luminous apparatus were present, as in R. atra. In this species the eyes 

 of the male are larger and the antennae longer than in the female. 



Lecontea angulata Say. — Numerous males of this species were 

 observed at Canajoharie, N. Y., on June 28th, flitting about over the flats 

 on the south bank of the Mohawk River, in a manner very similar to that 

 described last year for L. luci/era. As the time available for observation 

 was very brief, no females were found. 



*Ern. Olivier (Revue scient, du Bjurb. et du cent, de la France, 1911-12) 

 has recently segregated these two species, giving them the generic Tia.me Rileya. 



