THE ENTOMOLOGIST. 



(2) 3. External joint of pincers mutic, with neither plates 

 nor tooth ; internal joint inflexed before apex, with 

 one row of contiguous plates and one row of much 

 longer bristles .... 2. sepsoides, Westw. 



(1) 4. Second thoracic node glabrous ; vertex usually strongly 

 excavate. 



(6) 5. Vertex slightly depressed, but not strongly excavate 



3. pedestris, Dalm. 

 (5) 6. Vertex strongly excavate. 



(8) 7. Thorax entirely rufotestaceous ; second thoracic node 



basally trans-striate ... 4. oratorius, Westw. 



(7) 8. Thorax partly black ; second node not basally trans- 



striate. 



(12) 9. External joint of pincers mutic; internal joint strongly 



inflexed before apex, with one row of plates and one 



row of bristles. 

 (11) 10. Thorax entirely black; external joint of pincers centrally 



armed with bristles beneath . 5. distinguendus, Kieff. 

 (10) 11. Thorax red and black ; external joint without bristles . 



6. MarshalU, Kieff. 



(9) 12. External joint of pincers with one row of incrassate 



plates and one tooth before apex ; internal joint not 

 inflexed before apex, with two rows of plates. 

 (14) 13. Internal joint of pincers with two rows each of five 



very thick plates .... 7. bicolor, Curt. 



(13) 14. Internal joint with two rows of compact and contiguous 



plates . . . . . .8. distincttis, Kieff. 



1. Gonatopus striatus, Kieff. 



Andr^, Spp. Hym. d'Europ., 1904, p. 92. 



Described from an example taken in Austria during May, and 

 (lib. cit. p. 500) from one — erroneously ascribed to G. pilosus, 

 Thorns,, at p. 91 — found by Bignell in a nest of Formica fusca, 

 Linn., doubtless in Devon. Chitty took it on May 6th, 1906, at 

 Brandon, in Suffolk, but I who was with him took none. 

 Donisthorpe in 1915 records it as also consorting with Lasius 

 Jlavus, Fab. 



2. Gonatopus sepsoides, Westw. 



Loudon's Mag. Nat. Hist, vi, 1883, p. 496; Chitty, Entom. 

 Eec. xix, 1907, p. 80; G. sociahilis, Kieff. lib. cit., p. 7; 

 '? Dryinus pedestris, Hal. Entom. Mag. ii, 1885, p. 221. 



Westwood's name was sunk as a synonym of G. pedestris by 

 Francis Walker at lib. at. 1837, p. 412, and revived by Chitty 

 on examining the Oxford type in 1907. The latter considered it 

 not improbably identical with G. pilosus, Thoms., not hitherto 

 known to occur with us ; he instances it as the commonest British 

 species, apparently distributed over the whole country "in suit- 

 able localities," and records it from Suffolk, Kent, near London, 

 near Edinburgh Sussex, and three places in Hants. I found 



