1913.] 173 



M. iiobilis shares witb M. honannii, XJzel, the honour of being the 

 largest known European species of Thrills, and is recognized by the 

 shape of the head, the shorter tube in the female, and the lateral pro- 

 cesses of the 8tli abdominal segment (absent in M. honannii) in the 

 male. 



Another species of Mecjatlirqjs (M. lativentris, Heeger) was taken 

 by Dr. Eandell Jackson in Delamere Forest in June, 1907. — E. S. B. 



Fig. 6. — Acerentomon affine, Bagnall ( x 40, rough outline sketch). 



This species, which is the largest I have seen, belongs to the family 

 Acerentomidse of the recently diagnosed Order Protura, Silvestri 

 (Myrientomata, Berlese), an Order of wingless insects without antennae ! 

 It is closely allied to the type of the Order, A. doderoi, Silvestri, but 

 Silvestri says that it cannot be referred to his species. I have therefore 

 proposed the name affine for it. It occurs in large numbers (I have 

 taken 400 examples) in Gribside, amongst frass under bark of beech, 

 and is also lound in the Wear Valley. 



Members of this Order are really not uncommon in our Islands. 

 I have collected a good deal of material from the North of England, 

 the Forth area, and the neigbourhood of Dundee — comprising several 

 specimens representing the two families and three genera diagnosed by 

 Berlese — and hope to deal with the British species shortly. 



For further data see my paper [" Some Primitive British Insects. 

 I.— The Protura "] published in " Knowledge," XXXV, pp. 215, 216, 

 in June, 1912.— E. S. B. 



Fig. 7. — Hammer schmidtia ferruginea, Fallen. The first record 

 of the occurrence of this species in Scotland appeared on p. 191 of 

 this Magazine for 1912. It is a widely distributed, but distinctly 

 rare, northern insect which has been found in Scandinavia and the 

 mountains of Central Europe, and recorded by Loew as occurring in 

 Manitoba (Canada) , and by Williston from the Washington Territory 

 (U.S.A.).— J. E. C. 



Fig. 8. — Callicera yerhuriji, Verrall. Since Colonel Yerbury 

 took the original four specimens at Nethy Bridge (Inverness-shire) 

 in 1904 (v. p. 229 of this Magazine for that year), a few more have 

 fallen to his net in subsequent visits, but the carefully sought for 

 male has so far eluded capture. — J. E. C. 



Plate III. 

 Fig. 1. — Lophosia fasciata, Meigen. This very distinct Tachinid 



