10 BRITISH ICHNEUMONS. [P/ccfisnis 



4. canaliculatus, Fdrst. 



Plccfiscus zonatus. Gr. I.E. ii. 9S2; Holragr. Sv. Ak. Handl. 1854, p. 60, j ? (?). 

 P. cancrliculafiis, Forst. Verb. pr. Rlieinl. 1871, p. 86, ? ; Thorns. O.E. xii. 1303, 

 cT ? ; (?) Brisch. Schr. Nat. Ges. Danz. 1880, p. 201, ? . 



An elongate, black species with the pronotum piceous, the antennae 

 ba.sally below and the mouth including clypeus and legs whitish flavous; 

 petiole linear and elongate. The hind coxae are piceous, the second 

 segment not entirely smooth and the antennae are only i8-jointed. 

 Length, 3§mm. 



This is said by Thomson to differ from the last species in the extension 

 of the petiolar area to a little beyond the metathoracic centre, the terebra 

 only a third the length of the abdomen, the basal segment narrow and 

 elongate, the second longer than broad, and the radial nervure emitted 

 immediately beyond centre of stigma. 



We must await the time when Dr. Pfankuch revises the Gravenhorstian 

 types to know what P. zonatus really is: Forster (1871, p. 80) considers 

 it a compound species; Thomson (1888, p. 1307) thought it perhaps 

 synonymous with Proclitus grandis ; and in the same year referred speci- 

 mens to the present Forsteran species, which Bridgman considered 

 (Trans. Ent. Soc. 1889, p. 432) to represent P. zonatus. Though intro- 

 duced as British in 1870, there are no specific records of the latter with 

 us, and Haliday does not say that he knew it in 1839. 



The larva of what he considered to be Ciyptus (Plectiscus) zonatus, 

 Gray., is described by Bouch6 in 1834 as cylindrical, curved, soft, fleshy, 

 glabrous, shining, naked, white with translucent red; the small round 

 head has pale brown mouth parts; the penultimate abdominal segment is 

 elevated, and the anal extremity acuminate ; length, 3J^mm. It is said 

 to live solitarily in larvae of Hyponomcuta padella ; leaves its host to 

 pupate and makes for itself by the side of its host an elliptic, brown-grey, 

 papyraceous case (Naturg, p. 144). For my own part I do not believe 

 this to be the larva of a Plectiscid at all ; it is more probably Cryptid. 



Bridgman does not record P. canaliculatus from Norfolk, so the exam- 

 ples cited from England by Thomson were probably those referred to 

 by Bigncll (Ichn. S. Devon, 1898, p. 38) as "captured at Bickleigh, 4 Sep- 

 tember." 



5. terebrator, Forst. 



Plectiscus Terebrator, Forst. Verb. pr. Rbeinl. 1871, p. 87; Tboms. O.E. xii. 

 1302, ? . 



A black species with the abdomen not double length of terebra, the 

 basal scrobes of its petiole di-stinct and its centre, with legs and antennal 

 base, flavous. Head witli vertex somewhat narrow and clypeus only 

 apically flavous. Antennae slender with eighteen (J and twenty 9 joints. 

 Petiolar area not extending beyond centre of metathorax. Abdomen with 

 basal segment somewhat broad, the second partly rugose, and terebra but 

 slightly longer than half abdomen. Legs slender, with hind tibiae dis- 

 tinctly constricted at their basal third and basally infuscate. Length, 

 5 mm. (? 9 . 



This and the two following species are known from P. coUaris and P. 

 euristigma by their usually smaller size, slender legs and antennae, the 



