MONOGRAPH OF THE NORTH AMERICAN PROCTOTRYPID.E. <S3 



the anterior pair greatly lengthened ; femora obclavate, the front pair 

 the stoutest; tibiiii very long and slender, very little thicker at tips 

 than at the base; anterior tarsi chelate, middle and posterior tarsi, 

 5-jointed, shorter than their tibia?, the claws and pnlvilli small. 



This genus is readily distinguished from all the other genera in the 

 group by its peculiar shape, the strong constriction between the meso- 

 and meta- thorax, the absence of wings and scutellum, and the much 

 longer and more slender tibiai. In its cei)halic and anteunal charac- 

 ters it approaches nearest to Dryiuus, but otherwise it is (piite differ- 

 ent, that genus having wings, a distinct large scutellum, and is without 

 the strong constriction between the meso- and meta- thorax. 



The male is unknown, l)utl have reasons for believing tliat the genus 

 Lahi'o Haliday, known only in the male sex, will yet prove to be the 

 opposite sex of this peculiar genus. 



Mr. Cameron, in Biologia Centrali-Americana, has described t\vo or 

 three species that he supposed were wingless males, but as these so- 

 called males have chelate claws, I susjiect he has mistaken females for 

 males, as all the males in this group known to me have simple, not 

 chelate claws, tlie chelate claws being a character peculiar to the females. 



Our species may be tabulated as follows: 



TABLE OF SPECIES. 



FEMALES. 



Species more or less brown or pale brownish-yellow 2 



Species, excepting a portion of the lieiid, black. 

 Thorax pnnctnlatc. 



Head not twice as Inroad as long; metatborax, anteriorly and posteriorly, 

 transversely striated. 

 Occipnt, face, and two basal joints of anteniue, yellow, rest of antenufe 



fuscous G. CONTOKTULUS, Pattoii. 



Head twice as broad as long; metatborax, anteriorly and jjosteriorly, trans- 

 versely striated. 

 Occiput, face, and antenna-, except the three terminal joints, yellow. 



G. FLAVIFKONS, sp. nOV. 



Thorax polished, shining. 



Head entirely black (i. ih<:vai'IKNs, Prov. 



2. Abdomen black; head and thorax dark reddish-brown. 



Metatborax coarsely transversely striated; antenna- yellow; legs jiiceous or 



brown, the coxa-, and tarsi yidlow G. califohnicus, sp. nov. 



Abdomen piceous; head, thorax, and legs pale or yellowish. 

 Metatborax smooth, polished, with only a few faint, transverse stria-. 



G. 15ICOLOK, sp. nov. 



Gonatopus contortulus Patton. 



Can. Ent. xi, p. 65 (1879), 9 ; Asbm. Ent. Am. in, p. 71; Cress. Syn. Hym., p. 246. 



" $ . Length 3.5'"'". Head testaceous, mandibles and scape of an- 

 tenna' white; the teeth of the mandibles, second joint of the antenna;, 

 and a line on the scape posteriorly, pale testacecuis, renuiinder of an- 

 terniai fuscous. A large fuscous spot on the uuder side of head, and 



