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 



