CHARLES W. HOOKER. 151 



Fulvo-ferruginojis; wings more or less tuiged with fulvous ; radial 

 vein with base thickened and flexed ; discocubiial vein slightly sinuous ; 

 outer half of third discoidal cell enlarged. 



Length, 22-38 mm. ; wing, 15-27 mm. ; spread, 32-57 mm. ; antennae, 

 18-33 mm. 



Fulvo-ferruginous, varied to light flavous, clothed with fine, short 

 pubescence ; face, vertex and occiput frequently flavous ; eyes large, 

 black, emarginate ; ocelli prominent, black, with an outer ring of 

 flavous ; antennae long, slender ; face with a more or less distinct me- 

 dian carina running from the anterior ocellus to or below the antennal 

 fossae ; in one specimen forked at both ends but generally simple and 

 often indistinct ; mandibles bidentate, tipped with black. 



Thorax of the general color, opaque, finely and densely punctured ; 

 mesonotum smooth, sometimes with three longitudinal fuscous stripes ; 

 parapsidal furrows shallow ; scutellum prominent, convex, hollowed 

 in front, with more or less distinct lateral keels. Metathorax flattened 

 behind, its anterior, transverse carina irregular in shape, nearly straight, 

 angularly bent or sinuous, often notched in the middle ; the surface in 

 front is smooth, behind irregularly rugose, with a shallow, more or less 

 distinct median furrow, and several arcuate carins originating about 

 the insertion of the abdomen ; sides of metathorax reticulate. 



Wings generally more or less tinged with fulvous, sometimes hya- 

 line ; nervulus well antefurcal to interstitial ; nervellus broken well 

 beiow tbe middle ; radial vein thickened at the base and sinuate, with 

 a small glabrous area below its base in the discocubital cell ; discocu- 

 bital vein slightly sinuate, the outer half of the third discoidal cell 

 noticeably wider ; first recurrent shorter, sometimes much shorter than 

 the second ; legs of the general color or somewhat lighter ; claws pecti- 

 nate ; abdomen fulvo-ferruginous, sometimes more or less fuscous and 

 darker toward the apex, strongly compressed. 



In redescribing this species I have examined over a hun- 

 dred specimens from all parts of the country. 



Type- — Location unknown. 



E. macrurus shows considerable variation in coloration of 

 the body and wings, shape of the radial vein and anterior 

 transverse metathoracic carina, number of f renal hooks, size, 

 etc. Most specimens taken north of Mexico have wings 

 more or less tinged with fulvous, while in the majority of 

 Mexican specimens I have seen they are hyaline. Some 

 specimens, however, taken even as far north as Ottawa, 

 Canada, though otherwise characteristic macrurus, have hya- 

 line wings. The existence of specimens varying in this way 



TRANS. AM. ENT. SOC. , XXXVIII. 



