550 PROCEEDINGS OF THE ACADEMY OF [1893. 



strong fovese. Black; dorsal segments 1 and 3 and ventrals 2, 3 

 and 4, red; inner orbits below middle of front broadly, face, 

 clypeus entirely, scape in front, four anterior tibire in front, and a 

 spot near tbe base of the hind tibias, yellow; flagellum beneath 

 fulvous. Length 6 mm. 

 State of Washington. 



BOTHYNOSTETHUS Kohl. 



Botlivnostet Juts Kohl, Verb, zool.-bot. Gesell. Wien, p. 344, Taf. XVIII. 



f. 5 et 6. 1883. 



Body stout; head as broad as the thorax; eyes diverging towards 

 the vertex; the eyes at the bottom toueh the base of the mandibles, on 

 the outer margin of which there is no emargination ; clypeus toler- 

 ably stout; antennae placed close behind the clypeus, the distance 

 between them being twice as great as that between them and the 

 nearest eye-margin, and are short and stout; ocelli regularly round, 

 convex, placed in a low triangle; top of pronotum nearly on the 

 same level with the dorsulum, its lateral angles rounded ; shoulder- 

 tubercles not reaching to the tegulce ; wing neuration agreeing very 

 nearly with that of the genus Nysson; the stigma is much larger, 

 however, and the basal vein touches a little beyond the apex of the 

 median cell on the discoidal vein, whilst in all the known species of 

 Nysson this vein touches before the apex of the above mentioned cell; 

 radial cell broad, lanceolate, large, almost greater than the first sub- 

 marginal cell, without appendiculation; the second submarginal cell 

 receives both recurrent nervures, is triangular and distinctly ^etio- 

 lated; the first submarginal excels by far the combined length of 

 the second and third; the cubital vein of hind wings originates toler- 

 ably far beyond the apex of the median cell; the legs, includ- 

 ing the tarsi are stout ; middle tibice with one spur ; the anterior tarsi 

 have a very short comb, which is composed of slender spines ; the 

 remaining tarsi and tibise appear, with exception of the spines at apex 

 of joints, unarmed; the posterior femora reach their greatest breadth 

 at the apex, which is very rarely the case in other hymenopterous 

 genera ; claws not toothed ; last dorsal segment of 9 with a large, 

 triangular pygidium, which is covered with short pubescence; the £ 

 is similar to the 9 , except that the pygidial area is much less de- 

 veloped, is short and obtuse at tip. 



But one Nearctic species of this genus has been described. 



