412 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.59. 



Tribe GORYTINI. 

 Key to genera in the National Collection. 



1. Abdomen sessile, the first tergite broad and shorter, its apex nearly as wide as the 



base of the second tergite 2. 



Abdomen subpetiolate, the first tergite longer and its apical width much less than 

 the basal width of the second tergite 6. 



2. First recurrent nearly or quite interstitial with the first intercubitus and not caus- 



ing the cubitus to be angled; second recurrent interstitial or nearly with the 

 second intercubitus; nervellus nearly perpendicular and strongly antefurcal; 



propodeal inclosure tf ell denned Clytemnestra Spinola. 



Both recurrents received well within the second cubital cell and pulling the 

 cubitus down so it is angled 3. 



3. Nervellus interstitial Arigorytes Rohw er. 



Nervellus antefurcal 4. 



Nervellus postfurcal Ceratostizus, new genus. 



4. Anterior tarsi of female with a comb; inner margins of eyes in female subparallel; 



body with much appressed pile Trichiogorytes Rohwer. 



Anterior tarsi of female without a comb; inner margins of eyes not subparallel; 

 body without appressed pile 5. 



5. First tergite without a transverse depression before apex; body black and 



yellow Gorytes Latreille. 



First tergite with a transverse depression before apex; body black. 



Gorytes, subgenus, Argogorites Ashmead. 



6. Nervellus perpendicular and an tif ureal; recurrents interstitial or nearly with 



the intercubiti and not causing the cubitus to be angled; inner margins of the 



eyes strongly converging below Paramellinus Rohwer. 5 



Nervellus strongly reclivous; recurrents well within the second cubital cell and 

 causing the cubitus to be pulled down 7. 



7. Inner margins of the eyes subparallel 8. 



Inner margins of the eyes strongly converging below 9. 



8. Nervellus slightly antif ureal Mellinogastra Ashmead. 



Nervellus interstitial Mellinogastra, subgenus, Hypomellinus Ashmead. 



9. Nervellus antif ureal; prepectus present; mesopleura with a distinct dorsal plate. 



Hapalomellinus Ashmead 



Nervellus postfurcal; prepectus poorly defined or obsolete; mesopleura without a 



distinct dorsal plate Ammatomus Spinola (=Magalomma Smith, Ashmead). 



CERATOSTIZUS, new genus. 



Genotype. — Gorytes moneduloides Packard. 



Eyes large, occupying most of the side of the head, strongly con- 

 verging below; antennae strongly thickening apically; no suture 

 from tegula to prepectal carina; propodeum more or less sculptured, 

 with a well-defined inclosure; tarsal comb of female present, but 

 not long; first tergite shorter than the second, its apical width 

 as great as the basal width of the second; stigma well defined; both 

 recurrents received well within the second cubital cell and drawing 



6 Both Mickle and Bradley prefer to follow Ashmead and use the name Euspongus Lepeletier for this 

 genus. I have not seen the genotype and they may bo correct, but it seems doubtful inasmuch as the 

 species, other than the genotype, which were originally assigned to the genus, do not agree with bipunctatus, 

 the genotype of Paramellinus. 



