A NEW GENUS OF THE TRACHYSPHYRUS GROUP 
FROM SOUTHERN BRAZIL 
(HYMENOPTERA, ICHNEUMONIDAE)* 
By Charles C. Porter 
Biological Laboratories, Harvard University 
The author has completed a revision of the South American species 
of the mesostenine genus T'rachysphyrus Haliday (scheduled to be 
published during 1967 as a Memoir of the American Entomological 
Institute). In the course of this study there were discovered a few 
small groups of species definitely related to Trachysphyrus but ap- 
parently distinct enough to warrant recognition as separate genera. 
Some of these genera have already been described (Porter 1963, 
1965). Several more, limited to the Chilean faunal region, are cur- 
rently in manuscript and will be published as a unit at a later date. 
The present contribution treats an isolated and aberrant form known 
only from the southern Brazilian states of Santa Catarina and Rio 
Grande do Sul. 
Nelophia, new genus 
Flagellum: female: definitely flattened below toward apex, 1st 
segment 6. 1-6.5 as long as deep apically; male: segments of about 
proximal 3/4 with dense, erect setae beneath only for a short distance 
near base and apex, of distal 1/4 with progressively more extensive 
erect setae below; 1st segment 4.0 as long as deep apically. Front: 
unarmed, only weakly excavated. Ocellar Area: only slightly raised. 
Clypeus: rather low, blunt, asymmetrically subpyramidal in profile, 
gently and a little convexly sloping upward to near apex and then 
more steeply and a little concavely declivous; apical margin slightly 
convex. Mandible: 2. 5-2. 7 as long as wide across base of teeth; 
teeth subequal. Occipital and Hypostomal Carinae: occipital carina 
moderately low above, becoming a rather high flange laterally, lower 
again close to juncture or near-juncture with hypostomal carina; 
hypostomal carina very high, about 1/4- 1/3 as high as basal width 
of mandible, rather concave and scoop-shaped. Pronotum : dorsal 
margin a little swollen, with a shallow and obscure submarginal 
groove; epomia a long, sharp, oblique carina in scrobe, much weaker 
and prolonged only a short distance below, not defining a discrete 
swelling or lappet-like area above; anterior margin rounded-off or 
* Manuscript received by the editor May 11, 1967 
218 
