1917] A Synopsis of Eumenidce 357 



Eumenes verticalis Say. 



Eumenes verticalis Say, Thomas, Narr. Long's Second Expedition, vol. 2, 1824, 

 p. 346. — Saussure, Henri de, Etud fam. Vespid. vol. 1, 1852, p. 41. — Say, Thomas, 

 Writings of Th. Say (LeConte, J. L.), vol. 1, 1859, p. 233-234. 



Female. — Length, 11.75 mm.; wing; 9.25 mm. Similar to f rater nus, 

 from which it differs as follows: Thorax stouter, furrow of the pro- 

 podeum shallow, scarcely reaching the metanotum; petiole and second 

 segment of the gaster wider in proportion to length than those of 

 fraternus, petiole distinctly campanulate, widest before apical con- 

 striction, apical constriction and apical cordon more pronounced than 

 with fraternus; second segment of the gaster about as coarsely punctate 

 as the first. Black, but less shining than fraternus; basal half of clypeus 

 extending forward along the sides, greater part of the tegulse, a spot below 

 the tegulae, an oblique mark on the propodeum on either side of its 

 jointure with the petiole instead of higher on either side of the meta- 

 notum as in fraternus, apical margins dorsal and ventral of all segments 

 of the gaster from one to five, a dot on either side of the petiole, an 

 elongate oblique mark on either side of the second segment of the 

 gaster instead of a spot, ends of femora and greater part of tibia, and all 

 other markings found on fraternus, bright yellow instead of yellowish 

 white; tarsi testaceous; center of tegulae rufous; wings brownish. 

 Covered with pile of medium length. 



. Male. — Length, 10 mm.; wing, 7.5 mm. Clypeus entirely yellow; 

 no spot below the tegulae nor on the propodeum. Otherwise like the 

 female. 



Variations. — The amount of yellow on the clypeus is variable. 

 The spot below the tegulag is absent on about half the specimens at 

 hand, one lacks the marks on the propodeum and another lacks the 

 dots on the petiole. The yellow on the segments of the gaster varies 

 with individuals. 



Distribution. — The species was described by Say from 

 Pennsylvania. The National Museum contains specimens from 

 the following localities: Forest Hills, Suffolk Co., Mass.; 

 Philadelphia, Pa. ; Chain Bridge and East Falls Church, Alex- 

 andria Co., Va. ; Ind.; Mo.; Volga, Brookings Co., S. D.; and 

 West Cliff, Custer Co., Colo. 



Neotype. — Determined by the writer. U. S. National 

 Museum. 



This species is often confused with fraternus in collections, 

 with which Dalla Torre (Catalog. Hymen; vol. 9, 1894, p. 33), 

 suggests that it is a possible synonym. The two species are 

 readily separated by their difference in size, by the structure 

 of the first and second segments of the gaster, by the color and 

 color pattern. 



