372 THE CANADIAN ENTOMOLOGIST. 



Although, in the original description just given, the specimen is 

 recorded from a lepidopterous larva, it appears from Webster (1893) that 

 its relationship is not so clear, he having found the original specimens 

 under the body of the host larva, the latter "Killed by Rhogas i?iter- 

 medium Cresson." The species must be considered, therefore, doubtfully 

 primary on lepidoptera, the alternative being an ichneumonoid. Webster 

 writes : "It does not appear to be abundant." 



6. Arthrolytus ceneoviridis, species nova. 



Normal position. Fejiiak: — Length, variable, 2.00 mm. average; 

 normal in length for the genus. 



General colour dull dark green, nearly black, with brassy reflections, 

 and in certain lights metallic. Trochanters with some yellowish ; knees, 

 tibise and tarsi pallid yellow, the lateral aspect of the tibiae and the last 

 two tarsal joints dusky ; flagellum of antennae dull fulvous, the pedicel 

 darker and the scape concolorous with the body, fulvous at base and 

 apex ; eyes dull chestnut red, the ocelli ruby red ; wings hyaline, the ven- 

 ation pallid yellow. The abdomen with more greenish and in certain 

 lights with metallic bluish reflections and with some yellowish at dorsal 

 meson near base ; ventum concolorous with the general body colour. 

 TeguliB dark. 



Head (cephalic aspect) rounded, slightly convex, the antennae inserted 

 nearly in the middle of the face, slightly above (dorsad of) an imaginary 

 line drawn between the ventral ends of the eyes, the scape reaching nearly 

 to' the cephalic ocellus ; margins of head rounded or obtuse; eyes ovate, 

 in the lateral aspect, but their long axes pointing ventro-mesad and not 

 parallel with the dorso-ventral axis of the genae and less than half the 

 length of the gente, their surface fine, more delicate than that of the head 

 and practically naked, clypeus slightly emarginate at meson of the apical 

 margin. Dorsal aspect, head twice as wide as long, the occipital margin 

 not acute, the vertex wide between the eyes, the head one-third wider 

 than the thorax ; ocelli in a small triangle in the centre of the vertex, the 

 caudal ones not especially near the occipital margin and slightly farther 

 from the eye margin than from the cephalic ocellus ; the distance between 

 them is one-third more than the distance between either and the respective 

 eye margin ; all ocelli round and equal. The whole of the head, occiput, 

 pronotum, mesonotum including the axillae and the scutellum, and the 

 metanotum, closely, moderately coarsely, polygonally sculptured, most 

 regulaily on the mesonotum and more delicately on the head, pronotum 

 and metanotum, the sculpture being on the latter nearly transversely 



