50 [March, 



The true hetideti (teste Konow) is a dark-legged var. of lucorum, and 

 the true vitelline, L., does not seem to be a British insect. 



SYNOPSIS OF BRITISH TRICHIOSOMA. 



1. Abdomen black, not bronzy, rluU, closely and rather coarsely punctured, and 



clothed right up to the apex witli long, loose, grey, suberect hairs. (Attached 

 to the birch) lucorum, L. 



— Abdomen at least slightly metallic, somewhat shining, puncturation finer and 



more remote, hairs on apical segments shorter 2. 



2. Abdomen rufescent beneath and often at the sides. (Attached to willow)... 



silvatica, Leach. 



— Abdomen bronzy-black throughout 3. 



3. Tibiae black or dark brown. (Attached to hawthorn) tibialis, Leach. 



— Tibiae yellow. Apical segments of abdomen clothed with longer hairs than the 



last species. (Attached to willow) latreiUei, Leach. 



I believe all the species are [)retty widely distributed in this 

 country and all over Northern Europe. 



(2) Oi Abia I possess native examples of all the species given by 

 Mr. Cameron as British, viz., sericra, L., candens, Knw., lonicerce, L. 

 (= nigricornis, Leach), and fasciata, L. 



There is a mistake of some kind, which has often puzzled me, in 

 Mr. Cameron's Synopsis of the species. He separates all the other 

 species from sericea as having the fourth antennal joint " more than 

 twice the length of the third." Possibly for " twice" we should read 

 " half." At any rate, in all the species the third joint is, in fact, very 

 much longer than the fourth, though not quite so long proportionately 

 in the others as in sericea. 



I should tabulate our species as follows : — 



SYNOPSIS OF BRITISH ABIA. 



1. Antennae entirely yellow, their club consists of three clearly distinct joints. 



(Body brightly metallic, green or coppery) sericea, L. 



— Antennae not entirely yellow. The separation of the two apical joints in the 



club is obscure 2. 



2. Basal and apical joint of antennae black, the rest of them yellow. (Body metallic 



and very shining) .. candens, Knw. 



— AntennsB entirely black 3. 



3. Claws simple. Body shining black with a very slight metallic tinge of green : in 



the ? the propodeum (and generally the metathorax more or less) is white. 

 The basal joint of the long and narrow club is nearly as long as the other 

 two together .fasciata, L. 



— Claws bifid. Body brightly metallic, green or coppery. The basal joint forms 



only about a third of the whole club lonicercB, L. 



