134 THE ENTOMOLOGIST. 



the second posterior cell, its stem is not half the length of the cell. 

 Posterior cross-vein about its own length from the mid cross-vein. 



Legs with femora, tibiae, and metatarsi mottled with brown and 

 white scales. The apices of all the femora are white. White in- 

 complete basal bands are just visible on one or two of tlie tarsal 

 joints, particularly the second posterior tarsi, but appear to be absent 

 as a general rule. 



Length 7 -5 mm. 



Observations. — Described from a single female. It is a very 

 marked, large, rather clumsily built species. 



Locality and date of capture. — "Serpentine, Darling Eange, 

 near Perth, W. A., October 21st, 1906." 



Note. — This species is placed in Grahhamia on squamous 

 characters only, though it appears to be a much larger and 

 more solidly built species than any so far described in that 

 genus. As only one specimen was received, structural characters 

 by dissection could not be made out. 



(To be continued,') 



NEMOURA DUBITANS, Moeton, A SPECIES OF 

 PLECOPTEEA NEW TO THE BRITISH FAUNA. 



By Kenneth J. Morton, F.E.S. 



The list of British Neuroptera, even when the term is used 

 in its most comprehensive sense, is comparatively so short that 

 any addition to it is a matter of considerable interest. It was 

 therefore satisfactory to find in a small collection sent by 

 Lt. -Colonel C. G. Nurse for determination a male example of 

 Nemoura that seemed to be different from any of our known 

 British species. Permission having been obtained to detach 

 the abdomen for more thorough study, I am now able to deter- 

 mine the insect with certainty as Nemoura duhitans. 



The specimen was taken at West Stow, Suffolk, on April 11th, 

 1910, and as the time and place of its occurrence are known to 

 Lt. -Colonel Nurse, there is a reasonable hope that he will be able 

 to find the insect in numbers. 



The species was originally described in the Trans. Ent. Soc. 

 Lond., 1894, p. 565, pi. xiii., from dried examples taken by Dr. 

 Fr. Piis at Oerlikon, near Ziirich, in April and May, 1889. Any 

 hesitation about the validity of the species was dispelled by 

 Dr. Bis, who made a preparation of the genitalia of the male 

 type for his figures in his paper, " Die schweizerischen Arten 

 der Perliden-Gattung Nemura " (Mitt, schweiz. entom. Gessell- 

 schaft, Bd. 10, Heft 9), and proved the species to be very 

 distinct. It remained otherwise unknown until a male and a 

 female were recorded by Petersen from near Banders, in Denmark 

 ('Danmarks Fauna, Pseudoneuropteren ' ; Copenhagen, 1910). 



