MONOGRAPH OF TtlR NORTH A>fERICAN PROCTOTRYPID.E. 299 



Aiitoinia' 10-Joiiited, in both sexes, eudiiig- in a. (5-jointed elub, the 

 second fnnichir joint in tlie male very broadly dihited, the first beinii' 

 very minute and closely joined to, and not separable from, the second. 



Thorax ovoid, convex, the mesonotal furrows distinct, the scutellrm 

 rounded, the metathorax very short, bicarinated. 



Wings veinloss, almost bare of pubescence. 



Abdomen oval, the petiole short. 



Legsclavate, the hind tarsi longer than their til)ia', the basal joint long. 



A genus allied to Plati/fjasfcr, but readily sei^arated in the female by 

 the acute carina between the antennae, and in the male by the very 

 broadly and roundedly dilattnl second Hagellar joint, the first and sec- 

 ond being conjoined. 



Only a single species is known. 



Eritrissomerus cecidomyiae, sp. nov. 

 (PI. xiir, Fift". 1, 9 .) 

 $ . Length, 2.1"""- Black, subopaque, finely sculptured; head trans- 

 verse, the vertex and cheeks rugulose; frous with an impressed line 

 in front of the front ocellus, the face transversely striated; lateral 

 ocelli a little more than their width away from the margin of the eye; 

 mandibles rufo-piceous. Antennae 10-jointed, the scape, except at both 

 ends, and the 0-jointed club, brown-black; antennal tubercle, distal 

 ends of scape, the pedicel and funicle honey-yellow; the pedicel as 

 long as the firvSt and second funiclar joints united, the first funiclar joint 

 slender, closely united with the second and longer than thick, the second 

 obliquely truncate at tip; club 6-jointed, submoniliform, the joints 

 closely joined, except the last, joints not longer than thick. Thorax 

 with two distinct furrows, the scntellum convex, margined at sides, 

 closely punctate, the mesopleura impressed at the middle, the con- 

 vex piece beneath the tegulse striated, the metapleura bounded above 

 by a distinct carina, striate and pubescent. Wings clear hyaline, the 

 teguliie piceous. Legs blackish, the anterior pair, except the cox;e, 

 base of middle and posterior tibiiie, honey-yellow, the middle and pos- 

 terior tarsi brownish. Abdomen oval, scarcely longer than the thorax, 

 with the basal one-third of the second segment and the petiole striated. 



In the S the antenna^ are wholly brownish -yellow, with the second 

 funiclar joint very broadly roundedly dilated, the first, second, and last 

 joints of the club being distinctly longer than thick, while all the 

 trochanters and the knees of middle and hind legs are honey-yellow. 



Habitat. — J acksonville, Fla. 



Types in Coll. Ashmead. 



Described from several specimens, reared from a Cecidomyiid gall on 

 Hickory. 



POLYGNOTUS Forster. 



Hym. Stud, ii, p. 108 (1856). 



(Type P. striolatus Nees.) 



Head broadly transverse, the vertex broad, the occupit margined, 

 ocelli 3 in a triangle, the lateral close to the margin of the eye. 



