56 Rev. T. A. Marshall's monograph of 



The distribution of the colours is variable. Antennae $ as long 

 as the body, 38 — iO-jointed, fuscous above, rufescent beneath, 

 paler at the base. Head rufo-testaceous, tinged laterally behind 

 the eyes with fuscous. Prothorax black above ; mesothorax the 

 same, or with a testaceous central patch. Hind margms of the 

 abdominal segments fuscous ; segment 2 sometimes partly, and the 

 anal segment generally, testaceous. Hind tibine and tarsi fuscescent 

 at the apex. Stigma fuscous. Head wider than the thorax, 

 occiput not cihated, ocelli sahent ; mesothoracic sutures im- 

 punctate, converging into a smooth fovea ; metathorax smooth, 

 shining, with a medial bifurcate carina ; segment 1 about twice as 

 long as its breadth, gradually narrowed towards the base, punctato- 

 rugulose, the other segments smooth, the 4th and following mar- 

 gined behind ; pobrachial areolet of the hind wing less than ^ the 

 length of the prsebrachial. The ^ , not known to me, is described 

 by Wesmael as similar, but the number of joints in the antennas is 

 not stated. Antennae after death convoluted at the apex. 



Taken by Haliday among felled oaks, at the Cartland 

 Craigs, Scotland ; and twice lately near Plymouth by 

 Bignell. Wesmael had o females and 1 male from 

 Brussels and Liege. According to Giraud a parasite of 

 Ortalis coiinexa, Fab., bred from the fruit of Cijnanchum 

 rincitoxicum — an exotic Asclepiad — is doubtfully referable 

 to Exotliecus rujiceps, Wesm. {cf. Yerh. z.-b. G. "\Yien, 

 1861, p. 490). 



2. Colastes hariolator, Hal. 



Colastes hariolator, Hal., Ent. Mag., iv., 92, J . 

 Exothecus harhatus, Wesm., Nouv. Mem. Ac. Brux., 

 1838, p. 79, J ? . 



Very like the preceding, but smaller ; the head is less transverse 

 or more cu.bical, and the margin of the occiput cihated with long 

 whitish bail's. Testaceous, antennae at the base, palpi, and legs, 

 ochreous ; head, mesothorax more or less, metathorax, and 1st 

 abdominal segment, black ; terebra f the length of the abdomen. 

 Length, li ; wings, 3i hn. 



Antennae ? 33 — 40-jointed ; occiput distinctly margined and 

 cihated, especially in the middle between the eyes. The colours 

 are inconstant. The J is like the 2 . 



Var. 2 • Head and thorax entirely black. Hind cox^ at the 

 base, femora at the apex, and tibiae except at the base, fuscous. 



In a wood near St. Albans I took a $ with the pro- 

 aud mesothorax testaceous, and another at Bishop's 



