On Chalcidites inhabiting the Arctic Region. 331 trary the tubercles are much larger than those of D. repanda, and it wants the row of opake spots down the sides of the cloak which distinguish that species. The branchial plumes are also more numerous and the tentacula differently formed. v XLIII. — On the species of Chalcidites inhabiting the Arctic Region. By Francis Walker, Esq., F.L.S. Having in a previous communication mentioned the Chalcidites of the North American region, I will now proceed to notice the species discovered within the Arctic Circle. Several of them also inhabit England, and among these, as may be supposed, are the Chalcidites, which with us live through the winter or appear early in the spring. Eurytoma. E. verticillata, Fabr. ? = E. appendigaster Swederus, Zetterstedt. Isosoma. I. longulum, Ent. Mag. i. 14 = Eurytoma guttula, Zett. I ? (Eurytoma, ifetf.) minuta, Zett. Callimome. C. Bedeguaris, Linn. ? C. viridissimus, Zett. = C. affinis, Ent. Mag. i. 133. C. Tipulariarum, Zett. Zetterstedt describes some other species as varieties of C. viri-dissimus, but remarks that they are probably distinct species. C. chloromerus, Ent. Mag. i. 128. In the summer at Alten, Fin-mark. C. minutus, Ent. Mag. i. 137. Alten. C. posticus, Ent. Mag. i. 137. Hammerfest, Finmark. Ormyrus punctiger, Ent. Mag. i. 140. Alten. Euneura. Genus novum Coryncc affinis. Fern. Corpus convexum, robustum, subcylindricum : antennae 1 3-articulata3, subclavatse, thorace non longiores : parapsides scuto fere in unum confusse : petiolus brevis-simus : abdominis segmentum 2 um 1° plus duplo brevius; 3 um 2° duplo lqngius ; 4 um 3° paullo longius ; 5 um 4° paullo longius ; 6 um et 7 U brevi&sima : ulna brevis, crassa, humeri triente non longior ; radius ulna duplo longior ; cubitus ulna longior. Euneura Augarus, fern. Viridis, antennis nigris, pedibus fulvis, femoribus viridibus, mesotarsis et metatarsis flavis, alis limpidis. (Corp. long. lib. 1^ ; alar. lin. 2.) Body convex, robust, dark green : head and thorax finely squa-meous : head a little broader than the thorax : eyes oval, prominent, of moderate size : ocelli near together on the vertex ; the middle one Z2
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