35S PROCEEDINGS OF THE ACADEMY OF [May, 



Measurements. 



Type Allotype 



(female). (male). 



Length of body 20. mm. 14. mm 



Length of pronotum 4. " 3.3 



Length of tegmen 18.5 " 18. 



Greatest width of tegmen 4.3 " 4.5 



Length of exposed portion of wing 7.4 " 9.8 



Length of caudal femur 23.5 " 20.5 



Length of ovipositor 5.8 " 



The type and allotype described above are all of the species seen 

 by us. 

 Burgilis missionum n. sp. 



Type: 9 ; Misiones, Argentina. December, 1911. (P. Jor- 

 gensen, No. 5.) [Acad. Nat. Sci. Phila., type No. 5,224.] 



The short ovipositor and gradually tapering tegmina, which have 

 the marginal field not sharply narrowed and unmarked with white, 

 will readily separate this species. 



Size medium; form little compressed. Head with the fastigium 

 slightly narrower than in grandis and more distinctly sulcate, hardly 

 bulbous at the extremity; frontal fastigium narrower than in the 

 other species examined; eyes ovate. Pronotum of the form of the 

 other species, but shorter; lateral lobes with the depth contained one 

 and a third times in the length of the same, ventro-caudal angle of 

 the same obliquely subtruncate, humeral sinus rectangularly incised. 

 Tegmina three and one-half times as long as the head and pronotum, 

 regularly and not at all strongly tapering distad ; marginal field with 

 its greatest width distinctly less than that of the adjacent portion of 



Fig. 23. — Burgilis missionum n. sp. Fig. 24. — Burgilis missionum n. sp. 

 Outline of ovipositor of type. Outline of tegmen of male allotype. 



(X3.) (X2.) 



the discoidal field, regularly narrowing from the proximal third of 

 the tegmen to near the apex, without any decided point of excision; 

 apex obliquely subtruncate; median vein similar to that of the other 

 species of the genus; discoidal vein with three well-marked rami, all 

 reaching the sutural margin of the tegmen, the distal one practically 

 at the apex. Exposed portion of the wings about half the length of 

 the tegmina, the apex acute. Cephalic tibiae with four spines on the 

 dorso-caudal margin aside from the distal spine. Caudal femora 



