May, H) 18] Parasites of Leaj -Hoppers 263 



6. P. arizonica (Perkins). 



Eukwbelia arizonica Perkins, Rep. Exp. Sia. Hawaii, Ent. v. 2, Hull. 4, p. 44 

 ( 9 ), lfl07. 



Female: Reseml^les mirabilis. h\x\. \vinj.;s well dcvelo])efl, and raised 

 lines on j^roiKideum are more distinel. Ix'n<:[lh, '.\ mm. 



Nogales, Arizona. Bred from Bruconiorpha. 



Tribe Gonatopodini. 



Gonatopodinae, Kieffer, Andre. Spec. Hym. Eur., v. 0. p. 499, 1906. 

 Gonatopodini, Kieffer, Das Tierreieh, 41 L, 1914. 



Feinale: Head transverse or almost transverse, much broader than 

 the thorax, dorsalh' mostly concave, seldom flat or sli«[htly convex, 

 posteriorly seldom rounded; the sloping surface of the posterior head 

 concave. Eyes very large, almost occupying the entire side of the head, 

 projecting outward, bare, posteriorly strongly diverging. Ocelli small 

 and approximate, often indistinct or lacking. Maxillary palpus two to 

 six jointed, labial j^alpus two or three jointed. Mandible slightly 

 convex, three or four toothed. Antennae originating close behind the 

 ch'peus, slender yet less so than in Lestodryinini, seldom reaching the 

 hind end of the thorax, third joint the longest, the following gradually 

 becoming shorter until the penultimate, the tenth somewhat longer 

 than the preceding. Thorax strongly lengthened and of striking form, 

 namely, divided by a generally pedunculate construction in a fore and a 

 hind node, in one species asserted to be divided by two constrictions 

 into three nodes. The fore node is composed of the pro thorax and 

 carries ventrally the fore coxae; it is generally divided through a trans- 

 verse furrow into two parts, of which the anterior is generally the 

 shorter. The hind node bears ventrally the middle and the hind coxae, 

 and shows generally anteriorly a transverse suture, which continues 

 itself laterally obliqueh' towards the posterior part and ends between 

 the iniddle and the hind coxae, this node is composed of the metathorax, 

 the hind part of the mesothorax and the propodeum. The fore part of 

 the mesothorax becomes fonned through the nearly pedunculate con- 

 striction, which is joined to the fore node, without forming a jjart of 

 the same. Mesothorax and scutellum not visible, the latter often 

 recognizable as a trace on the anterior part of the hind node. In Gyn- 

 ochelys the mesonotum and scutellum are distinct though quite small. 

 Tegula and wings quite lacking, except in Gynochelys where the tegula 

 is present and the wings replaced by a barely visible, scale-like process. 

 Fore legs because of the divergent form of the thorax very widely sep- 

 arated from the middle legs, coxa and trochanter greatly lengthened, 

 the latter generalh' proximally more slender than distally, also club- 

 shaped femur and tibia shorter and thicker than those of the other legs, 

 the femm- proximally greatly thickened, the tibia distally and less 

 strongly thickened, meta-tarsus and fourth joint of the tarsus long, the 

 three other joints short, in Cryprtogonatopus the fourth joint is also 

 short, median chela arm ventrallv with rows of lamellae; lateral chela 



