1885.] 179 



Common in some localities. Chobham, Wandsworth, Worthing ; 

 S'orwich (J. B. Bridgman) ; Hampstead (T. E. Billups) ; Penzance (E. 

 D. Marquand) ; Exeter (E. Parfitt) ; Gloucestershire (Y. E. Perkins) ; 

 ::)olchester (W. H. Harwood) ; Hastings (Eev. E. N. Bloomfield). 



). similis, Wesm., Bull. Ac. Brux., ii, p. 279, 1835. E. Saund., Trans. 



Ent. Soc, 1882, p. 198, pi. viii, f. 4. v. Hag., Deutsche Ent. 



Zeit., xxvi, 1882, pi. vi, f. 12. 



(? readily known from that of i^ilifrons by the shorter abdomen, the more 

 ■ounded joints of the antennae, the narrow 2nd sub-marginal cell, and the bifid 

 aciniae of the armature. 



? scarcely distinguishable from pilifrons, except in size and in the form of the 

 lorsal apical valve, which is rather narrower, and has a distinct impression running 

 parallel to the margin. Length, 6 — 8 mm. 



Common in many localities. Bromley, Chobham, Canterbury, 

 ^outhwold. Worthing, Littlehampton ; Norwich (J. B. Bridgman) ; 

 Margate (T. E. Billups) ; Exeter (E. Parfitt) ; Penzance (E. D. Mar- 

 juand) ; Grloucestershire (V. E. Perkins) ; Colchester (W. H. Har- 

 wood) ; Cuestling, near Hastings (Eev. E. N. Bloomfield). 



LO, ferruginatus, Schenck. v. Hag., Deutsche Ent. Zeit., xxvi, 1882, 



p. 221, pi. vii, f. 13. 



(? easily known by the unspotted red basal segment of the abdomen, and the 

 •ather broad form of the abdomen itself, so that but for the length of the antennae 

 md blunt apex of the abdomen, the S "^ei'y closely resembles the ? ; alar hooks 

 ) — 7 ; thorax shining, but somewhat closely punctured, pubescence at the base of 

 he antennal joints extending to about one-third of their length ; genital armature 

 iirith the lacinia straight along its external margin, which is slightly thickened at 

 ;he apex, and with a triangular membrane on its inner margin, extending along and 

 )eneath the inner margin of the stipes ; stipes widely grooved at the base, the groove 

 xtending to about half its entire length ; extreme apex of the lacinia with long 

 lairs. 



$ with the mesothorax more sparsely punctured than in the <? ; apical dorsal 

 ralve shining, testaceous, its centre narrowly and much raised ; alar hooks 6 ; 3rd 

 ibdominal segment without lateral foveae. Length, 6 — 7 mm. 



Very rare. Scotland, Dumfriesshire (E. Service), ^ and $ ; Col- 

 ihester (W. H. Harwood), ^ ; Gloucestershire (Y. E. Perkins). 



il. Jiyalinatus, Schenck. v. Hag., Deutsche Ent. Zeit., xxvi, 1882, p. 



I 222, pi. vii, f. 14. 



' <? very like the preceding, but decidedly smaller, with the extreme base of the 



[-8t abdominal segment more or less black or dark; the genital armature is very 



'tlifferently formed ; the lacinia being much shorter and wider at the base, so that 



sts thickened portion is more or less triangular, its membrane is shaped much as in 



^erruginatus. 



