J. CHESTER BRADLEY. 137 



TABLE TO THE GENERA OF NORTH AMERICAN EVANIIN^. 



1. Abdomen of the female distinctly triangular, the apex produced into a short 



process from which issues the ovipositor (Fig. 18) ; abdomen of tlie 

 male more or less narrowly oval ; antennae inserted in a single dis- 

 tinctly impressed basin, bordered at least on the lower side by a ridge ; 

 usually an inter-autennal carina present; metanotum as seen from 

 the side move or less deeply depressed, sides of the depression abrupt 



(Fig. 62), (Tribe Ev.\niini) (2), 



Abdomen of tiie female nearly circular (rarely somewhat triangular), the a])ex 

 not produced into a process (or rarely slightly produced in Evaniella), 

 abdomen of the male the same shape as in the female (sometimes oval 

 in Ei'aniella) ; antennae not inserted in a distinctly impressed basin, 

 without any carina below them, rarely between them ; metanotum as 

 seen from the side less deeply depressed, the sides of the depression 

 sloping gradually (Fig. 63), (Tribe Hyptiini) ('.i). 



2. Front wings with the maximum number of veins found in the subfamily, ex- 



cept parts of R4, Mi + 2, Mi, Mo, and m may be more or less atrophied ; 

 labium modified into a highly chitinized pear-shaped plate which 

 nearly covers and conceals the ligula (Figs. 28-29). 



Evania Fabricius. 



3. Wings with seven completely closed cells (Fig. 83), hind legs long, exceeding 



the whole length of the insect Evanielia Bradley. 



Wings with only the costal cell completely closed (Fig. 86) ; hind legs much 

 shorter and stouter than in any other genus of the subfamily, not ex- 

 ceeding the total length of the body (Fig. 61) Hyptia Illiger. 



EVANIA Fabricius. 

 Ichneumon, Sphex, etc., auct. 

 1775. Evania Fabricius, Syst. Ent., p. 345. 



Type — Evania appendig aster Linnaeus. 



The .scape of the anteunje of the female is much longer than in 

 the male. The proportions in actual measurements of the antennal 

 joints are surprisingly constant in the North American species. The 

 labium is highly chitinized and broadly oval, dilated at the ba.«e, 

 almost concealing the short ligula (Figs. 28 and 29). The labial 

 palpi have the third joint greatly dilated and triangular. The fore- 

 head has an impressed basin in which the antennje are inserted, 

 bordered by a distinct rim below ; there is usually a short inter- 

 antennal carina, and may be a mesal and two lateral carina; on the 

 clypeus. The sculpture of the face and mesonotum is of prime 

 importance; in one of our North American species the face is 

 closely striate, in the other with a very few small scattered punc- 

 tures. 



The mesopleurjc do not show a distinctly smooth and jx^lished 



TEANS. AM. ENT. SOC. XXXIV. (18) APRIL, 1908. 



