1910.) 181 



variable in respect to inner ; length of piibesence, size, and colour 

 also very variable ...Length, 0.74 — 0.96 mm. P. nitidum, Heer. 



= pusillum, Erichs., nee Gyll. 

 = Ixvigatum (pars), Matth., nee Gyll. 



In the following references to Miitthews's collection, the European 

 portion of it is implied. The British collection, with the exception of 

 the type specimens, being at present in the hands of Professor Ericson 

 for examination. All the specimens referred to have been examined 

 by one of us. 



P. gresmeri, Ericlis. (Nat. Ins. Deutschl., Ill, 13, 1845), Grillin. 

 Introduced as British by Blatch in 1883 (Ent. Mo. Mag.,xx, 121).— 

 New Forest, in rotten wood, especially beech (Champion), in rotten 

 wood infested with fungus, rare (Dr. Sharp), (Toinlin) ; Bradfield 

 (Dr. Joy) ; " no connection with ants " (Dr. Sharp). 



P. Isevigatum, Erichs. (Nat. Ins. Deutschl., Ill, 36), nee Matth. 

 Represented in the Matthews collection by two nitiduin, Heer, and 

 several i)imlhrni, Gyll. — Widely distributed from Cumberland to the 

 Isle of Wight.. Found with Formica riifa and Lasius fuligmosus, in 

 moss, rotten wood, moles' nests, &c., and rather common. Numerous 

 specimens in the Matthews collection under /ormicefor?(w. 



P. turgidum, Thoms. ((Efv. Vet.-Ak. Forh., 340, 1855). Eepre- 

 sented in the Matthews collection by a specimen (co-type ?) from 

 Thomson, and by an intermedium, Wanlc. — New Forest, in rotten 

 wood infested with fungus, "especially in beech" (Champion), rare 

 (Dr. Sharp), "in hundreds" (Tomlin) ; Cobham Park, Kent (J. J. 

 Walker), " no connection with ants " (Dr. Sharj^). 



P. intermedium, Wank. (Ann. Soc. Ent. Fr. Ser. 4, ix, 412, 1869). 

 The type of wanhovnezii, Matth., in liis British collection is a rubbed 

 and dirty specimen of pusillum, Gryll. In the European collection are 

 two specimens : the first is pusiUtim., and so labelled by Jekel ; the 

 second is probably a small immature intermedium, labelled " Italy."- — 

 Brockenhurst, in very powdery decayed wood, six specimens (Newbery) ; 

 Tring, in very rotten willov/ (Elliman) ; Sandown, Isle of Wight 

 (Champion) ; Falkirk, Scotland (Hislop, ex coll. Champion) ; Dim- 

 chediock, Exeter District (de la Garde). 



P. punctatum, Gyll. (Ins. Suec. IV, 293). — Under seaw^eed on all 

 our coasts, usually in profusion. It has also been found inland, in 

 clung heaps, shingle, moss, &c. These inland specimens are usually 

 smaller than the coast form, and have occurred at Hendou, Eslier, 

 Woking, Great Salkeld, &c. 



