﻿NEW GENUS AND SPECIES OF HYMENOPTERA OF THE 

 FAMILY BRACONIDJE FROM PANAMA * 



By H. L. VIERECK 



The following descriptions are published in advance of a report on 

 the Ichneumonoidea collected in Panama by Mr. August Busck in 

 the course of the Smithsonian Biological Survey of Panama, in 

 order that they may appear synchronously with a report of the host 

 published by Mr. August Busck and containing a photograph 2 of 

 both host and parasite. 



SESIOCTONUS, new genus 



This genus has characters in common with Earinus Wesmael and 

 Snellenius Westwood, to the former of which it is certainly related. 

 Carinas bounding the mouth posteriorly, highly developed, buttress- 

 like; lower part of front with a longitudinal crista between the 

 scrobes ; clypeus separated from the face above by a shallow furrow ; 

 face with two vertical impressed lines extending from each end of the 

 furrow between clypeus and face half-way up the latter ; maxillary 

 palpi 4- jointed; areolet subpetiolate, triangular; nervellus not at all 

 broken; claws simple; propodeum not at all carinate, with elliptical 

 spiracles ; first dorsal segment approximately as long down the middle 

 as wide at apex, not carinate; otherwise essentially as in Earinus 

 Wesmael, as represented by the genotype. 



Type. — Sesioctonus parathyridis, new species. 



SESIOCTONUS PARATHYRIDIS, new species 

 Female. — Length 1 1 mm. ; head black and polished ; face sparsely 

 punctured, clypeus less so; first and second joints of palpi black, 

 remaining joints stramineous; other mouth parts mostly black or 

 blackish, flagel 44-jointed, most joints longer than thick, 25th to 35th 

 joints mostly a little thicker than long; prothorax mostly black. The 

 upper and lower hind angles of the lateral aspect of the pronotum 

 stramineous; fore legs mostly black; rest of thorax including the 



1 The present paper is the ninth dealing with the results of the Smithsonian 

 Biological Survey of the Panama Canal Zone. 



2 Smithsonian Misc. Coll., Vol. 59, No. 4, pi. 1, 1912. 



Smithsonian Miscellaneous Collections, Vol. 59, No. 5 



