BRUES: PARASITIC HYMENOPTERA. 11 



lateral view and the absence or presence of a median carina cannot be made 

 out. Abdomen nearly as long as the head and thorax together, the petiole 

 nearly twice as long as thick, coarsely striated. Second segment very large, 

 covering nearly the entire surface; entirely smooth, following all short, 

 transverse-linear, together only about one-sixth the length of the second. 

 Wings and legs not preserved. 



One specimen, A32, collected by Mr. S. A. Rohwer at Station No. 14. 

 Type in the Amer. Mus. Nat. Hist. 



This is a typical belytid, not very readily assignable with assurance 

 to any particular genus, and therefore left in Belyta, sensu lato. 



DIAPRIIDAE. 



Two genera, one of them new, are represented each by a single 

 species in the present series from Florissant. 



Paramesius defectus, sp. now (Fig. 4.) 



Female. Length 4-5 mm. Black; antennae at base and legs reddish 

 brown. Antennae probably 13-jointed, gradually clavate, all of the flagellar 

 joints however longer than wide. 

 Thorax oval, rather long, the meso- 

 notum with complete but rather 

 delicate parapsidal furrows. Scu- 

 tellum with a large, broad trans- 

 verse median fovea at the base. 

 Metathorax very short, with three 

 longitudinal carinae. Abdomen 

 rather short, twisted at the base in 

 the type so that the petiole is not 



preserved; broadest just beyond Fig. 4. — Parameshrs defectus, sp. nov. 

 the middle. Wings slightly, but 

 distinctly infuscated; submarginal 



vein long, two-thirds the length of the wing, stigmated. Basal vein obsolete. 

 Legs long and slender. 



One specimen. 



Type.— No. 2061, M. C. Z., Florissant, Col. (No. 13,394, S. H. 

 Scudder Coll.). The specimen is not well preserved, but undoubtedly 

 is a member of this genus or of a very closely related one. The head 

 of the type is peculiarly constricted, but I think this is undoubtedly 

 due to the pressure of the matrix. 



