Ophion~\ BRITISH ICHNEUMONS. 269 



C. argculina, Hiifn. It appears very improbale that De (jeer's parasitic 

 larva, which t'liierfred from its bulbiriferous e,ng and was an ektoparasite 

 {/oc. c I /. ct Kirby and Spence, cd. vii. 154) was referable to the present 

 genus. 



3. calcaratus, sp.n. 



A very pale testaceous species, with close pubescence. Head nearly as 

 broad as eyes with vertex not very narrow, its ocelli contiguous with eyes 

 but widely discreted i/i/rr sr. Antennae usually infuscate. Apical metan- 

 otal transcarina obsolete, though the two longitudinal costae extend to 

 apex of metathorax and are often distinct. The inner hind calcar 

 distinctly incrassatc towards its base and strongly ciliate. I^ength, 

 iQ-22 mm. J 9 • 



I have ventured to discriminate a large and slender form with the elong- 

 ate conformation and close pubescence of O. dis/iins, but differing from 

 (). Iiitcus in little but its longer body and distinctly incrassatc inner hind 

 calcaria, as a distinct species. 



This is an undoubtedly uncommon form of the last species, or rather o( 

 the next one to which its large and slender build more closely allies it. 

 A pair was first taken by Mr. W. H.Tuck atTostock in Suffolk during the 

 middle of September, 1898 and 1899 ; ^Ir. E. W. Flatten found males on 

 the Ipswich street lamps in October, 1900 ; and 1 have subsequently 

 caught both sexes between 8.30 and 10 p.m. around my study lamp at 

 Monks Soham, but it occurs only singly and my earliest date is 17th 

 August. 



4. distans, Tlionis. 

 Ophion ilistctiis, Thorns. U.E. xii. 1191 : Brauns, Arch. Nat. Meckl. 1889, p. 91, 



A very jjale testaceous species, with close pubescence; large and 

 slender. Mead with vertex not very broad and temples a little narrower 

 than eyes, which are distinctly remote from ocelli and to a lesser degree 

 from the mandibular base, intermediate calcaria strongly inequal in 

 length. Length, 18-22 mm. 



Similar to O. lulfus in size and conformation, though more slender 

 with the whole body and especially the abd(jmen more densely pubescent, 

 the vertex less narrow, but especially distinct in the obviously remote 

 ocelli from the eyes. Brauns was sceptical of its specific value and his 

 doubt is legitimate, but the distinct ocellar position is sulliciently obvious 

 to admit of some diflferentiation from tyjiical O. liiliiis. 



This large pale form with distinct chci'ks and vertical orbits is by no 

 means rare with us, though only reiorded from Sweden and brought for- 

 ward as British with a query by Bridgman in 1889 (I'rans. l*",nt. Soc. 

 p. 419) on the strength of examples bred by Cross at Kly and by l^ignell 

 from DiatillhJiiia irrci^iilaris in I)evt)n ; lie says the (-ocoon is unicok)rous 

 j)ale brown; and subscijui'iitly records the species without hesitation Irom 

 Norfolk. I have examples from (niestling (Bloom(ield), .St. Ives (Wain- 

 wright\ Felton near Bristol (Cliarbonnier), Slu're (C'apron), l""eldi'n 

 (PilTard), Aldeburgh (Tuck), Tuddi'iiham Mall at light (i':ilii)tl), Lincoln 

 at light (.Musham), Manton Common in Lines (ThornU'y), Barnsley at 

 electric light (Bayford), Hying over heather in April of 1899 at Galashiels 



