32O ENTOMOLOGICAL NEWS [July, 'll 



from which the following descriptions are drawn were taken 

 in the vicinity of Harrisburg, Pa., and have been determined 

 by Mr. D. W. Coquillett. 



$ Length 10 mm. Slender, shining metallic green. Face me- 

 tallic shining green, narrow, sides parallel, sparsely clothed with 

 pale yellow pile; front rather strongly constricted midway between 

 ocelli and base of antennae, metallic shining green excepting ocel- 

 lar tubercle which is violaceous : pile of front black sprinkled with 

 yellow. Antennae black, third joint somewhat shorter than first. 

 Ocelli quite remote from vertex. Eyes shortly and sparsely pilose. 

 Thorax, dorsum and pleurae metallic shining green, thinly cover- 

 ed with pale yellowish pile which is more dense on pleurae. Scu- 

 tellum subconvex, metallic green, impressed, sparsely pale yellow pi- 

 lose, bearing an obtuse concolorous tubercle upon each side of apex. 

 Abdomen slender, metallic green, punctulate and thinly clothed with 

 pale yellow pile ; apical segment blackish. Femora and tibiae me- 

 tallic green ; tarsi blackish above and brown beneath. 



9 Differs as follows from $. Pile of face nearly white, sides 

 of front parallel. Color of entire body of somewhat bluer cast. 

 Disc of thorax with violet tinge; last two segments of abdomen 

 violaceous. 



One specimen, Carlisle Junction, Pa., F. Craighead. One 

 specimen, Enola, Pa., H. F. Adams. One specimen, Rock- 

 ville, Pa., author. 

 Idana marginata Loew. 



In life this is a very handsome species. Apparently it is 

 quite local in distribution and exists but a short time in the 

 adult stage. It is to be found in shady spots bordering road- 

 sides or along the edges of wooded land, and seems to be par- 

 ticularly fond of roosting on old rail fences, and is to be sought 

 only upon warm, still days. It has the habit in common with 

 many other Ortalids of strutting about with the wings held 

 at right angles to the body, occasionally rotating them through 

 a quarter circle forward and back while held in this position. 

 The species flies swiftly but usually aliehts within a few feet 

 of its original resting place. During life the darker portions 

 of the wings and body have a metallic purplish luster which 

 entirely disappears in dead and dried specimens. Taken rather 

 plentifully some years in June near Harrisburg, notably at 

 Progress, Pa., in 1909 by Mr. H. D. Bailey and the writer. 



