148 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.43. 



Genus OPHRYNOPUS Konow. 



Ophrynopus Konow, Term. Fuz., vol. 20, 1897, p. 605. 

 Type. — Ophrynopus andrii Konow (Roliwer, 1911). 



OPHRYNOPUS (?) DENTIFRONS (Philippi). 



Oryssus dentifrons Philippi, Stettin. Ent. Zeit., vol. 34, 1879, p. 303, pL 1, 

 fige. 5 a-c. 



This species, which was overlooked by Konow, may form a new 

 genus. If the figure is correct it may be separated from Ophrynopus 

 by the very short malar space, and the facial carinse are (judging from 

 the description) nearly parallel. 



Genus LITHORYSSUS Brues. 



Lithonjssus Brues, Bull. Amer. Mus. Nat. Hist., vol. 22, 1906, p. 492. 



Type. — Litlioryssus parvus Brues (Monobasic). 



Brues described a Hymcnopteron which he says should fall in 

 Oryssinx Konow. This genus is loiown only from the description, 

 but judging on this basis, I doubt if the genus belong to this group; 

 in fact, it may not even be a Chalastogastran. If the number of 

 abdominal segments is correct it can not belong in Oryssidse, as at 

 present defined, or even in Chalastogastra. The fewest number of 

 abdominal segments in the Chalastogastra occur in the Oryssoidse, 

 where there are eight. The venation is also quite different. 



Genus ORYSSUS La.treille. 



Oryssris Latreille, Precis Char. Gen. Insect., 1796, p. 111. — Fabricius, Suppl, 

 Ent. Syst., 1798, p. 218. 



Type. — Oryssus coronatus Fabricius (Latreille, 1810). 



The genus Oryssus was established in 1796 by Latreille, but no 

 species were placed in it until 1798, when Fabricius placed Oryssus 

 coronatus Fabricius and Oryssus vespertilio Fabricius in the Latreillian 

 genus. The first of these was made the type of the genus by Latreille 

 in 1810. At present both forms are regarded as the same. 



(A)' Second antennal joint distinctly more than half as long as the third; a distinct 

 carina behind the eyes; thorax ferruginous. 



ORYSSUS THORACICUS Ashmead. 



Oryssus thoracicus Ashmead, Can. Ent., vol. 30, 1898, p. 178.— Bradley, Trans. 

 Amer. Ent. Soc, 1901, p. 318. 



Female. — Length, 4.75 mm.; clypeus regularly rounded, the apical 

 margin depressed, not emarginate; front below the ocelli regularly 

 reticulate; posterior orbits irregularly reticulate behind the carina 

 which is close to the eye; postocellar line distinctly shorter than the 

 intraorbital line; second antennal joint distinctly more than half the 

 length of the third, third subequal with the two following, sixth about 



» The grouping is based on the female. 



