516 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 5T. 



4. Hind femora rufous tipped with black; hind coxae black with a white spot above 



and below decorus (Say). 



Hind femora mostly black 5. 



Hind femora entirely ferrugineous 6. 



5. Dusky spot surrounding base of radius; cheeks seen from in front full and rounded; 



mesepisternum of female black Jormosus Cresson. 



No dusky spot below stigma; cheeks seen from in front straight, sloping; mesepis- 

 ternum marked with yellow in both sexes amoenus Cresson. 



6. Females 7. 



Males 8- 



7. Stigma largely yellowish; vertex, and mesoacutum black; apical tergites largely 



black and contrasting sharply with the yellow hypopygidium. occipwtoZis Cresson. 

 Stigma black; vertex and mesoscutum largely rufous; apical tergites largely 



yellowish ferruginous, the hypopygidium the same color vidnus Cresson. 



8 Stigma largely yellowish; base and apex of first tergite yellow; mesepisternum 



entirely or almost entirely yellow ocdputalis Cresson. 



Stigma black; first tergite yellow apically the base black; mesepisternum black. 



vicinv^ Cresson. 



AROTES MELLEUS (Say). 



Acoenites melius Say, Boston Journ. Nat. Hist., vol. 1, 1835, p. 249.— LeConte, 

 Edition of Say, vol. 2, 1859, p. 703 



Tyi^e lost, discussion based on a single neotype. 



Female. — Length, 9 nun.; length of ovipositor, 8 mm. Face with 

 a few dorsad-ventrad striae centrally, laterally transvereely striato- 

 punctate; frons, vertex, and temples without punctures; scutum 

 without punctures; notouli not foveolate; suture in front of scu- 

 tellum with a few rugae; areola and basal area confluent, the former 

 poorly defined the latter parallel-sided; propodeum almost without 

 sculpture; mesepisternum shining with widely separated, distinct 

 punctures; nervulus an tef ureal by about half its length; recurrent 

 distinctly an tef ureal. Ferruginous; face, scape beneath and scu- 

 tellum and metascutellum yellow; a large frontal spot and some 

 sutures of thorax blackish; legs ferruginous, tibiae and tarsi rather 

 paler; antennae brownish with a broad yellow annulus; wings 

 hyaline with the apical margin dusky; venation including stigma 

 dark brown. 



Say's specimen came from Indiana; the specimen described above 

 was collected at Delaware Water Gap, New Jei-sey, July S. 



The neotype differs from Say's description only in the color of 

 the antennae. The original description says: "Antennae white; 

 basal two-thirds above black." It may be that the apical joints 

 of the antennae were wanting in the specimen examined by Say or 

 it is possible that the color of the antennae may vary. 



AROTES RUPINSULENSIS (Cresson). 

 Acoenites nipinsulensis Cresson, Trans. Amer. Ent. Soc, vol. 3, 1870, p. 143. — 

 Walsh, Trans. Acad. Sci. St. Louis, vol. 3, 1873, p. 152. 



Type, a single female, Cat. No. 2049, Acad. Nat. Sci., Philadelphia. 



Besides the characters given in the above key this species may be 



distinguished from melleus by having the scutellum concolorus with 



