368 S1KICTD.E. 



15. Oryssus dentifrons. 



Oryssus dentifrons, Phil. Stett. ent. Zeit. xxxiv. p. 303, pi. i. figs. 

 5 a-e (1873). 



Hab. Valdivia, Chili. 



Subfamily II. XIPHYDRIINiE. 



2. DERECYRTA. 



Derecyrta, Smith, Ann. Nat. Hist. (3) vi. p. 255 (1860) ; Westw. Thes. 

 Ent. Oxon. p. 121 (1874). 



I retain this genus for the Xiphydriince with one radial cell and 

 a short ovipositor, leaving the Chilian species with two radial cells 

 in Brachyxiphus. 



1. Derecyrta pictipeniiis. 

 (Plate XIV. fig. 13.) 



Derecvrta pictipeniiis, Smith, Ami. Nat. Hist. (3) vi. p. 255 (1860) ; 

 Westw. Thes. Ent. Oxon. p. 121, pi. xxiii. fig. 2 (1874). 



Exp. al. 1 poll. 4 lin. ad 1 poll, (j lin., long. corp. 7-10 lin. 



Head, which is rugose in front, antenna', legs, and the last four 

 segments of the abdomen (except the middle of the sixth above) 

 shining black ; thorax and first five segments of the abdomen 

 shining luteous. Wings brown, radiated with yellowish hyaline at 

 the base, most continuously on the hind wings, and with a broad 

 common hyaline band beyond the middle, ceasing before the hind 

 margin of the hind wings. 



Hab. Amazons. 



a. 2 • (Type.) Ega. H. W. Bates, Esq. 



b. ? • St. Paulo*. H. W. Bates, Esq. 



2. Derecyrta lugubris. 



Derecvrta lugubris, Westw. Thes. Ent. Oxon. p. 122, pi. xxiii. fie. 3 

 (1874). 



Hab. Brazil. 



* The specimen from St. Paulo is smaller and paler than the type, and 

 only the last three segments of the abdomen are black ; but there areno other 

 differences. 



