-ART. 3 WASPS OF SUBFAMILY BRACHYCISTIINAE MALLOCH 5 



atrata and some others have no la])el to indicate how they were 

 taken. 



This record of the occurrence of a species in the daytime is ot 

 interest as the general opinion is that they are strictly nocturnal. 



Genus BRACHYCISTIS Fox 



The subtamily contains but one genus, which is divisible into at 

 least three well defined segregates, one of which is made use of 

 herein for the first time. These segregates, which I accept as sub- 

 genera, may be distinguished as in the following key. 



KEY TO SUBGENERA 



.1. Mandibles with at most two teeth, .sometimes with only a slight angle in 

 addition to the apical tooth; fore wing with both recurrent veins and either 



two or three submarginal cells Brachycistina, new subgenns, p. 25. 



Mandibles with two distinct teeth in addition to the apical one, or the second 



recurrent vein is lacking in forewing 2. 



2. Only one recurrent vein present in fore wing; fore coxae without a stridulatory 



area Brachycistellus Baker. 



Two recurrent veins present in fore wing; fore coxae with distinct stridulatory 

 area Brachycistis Fox, p. 5. 



Subgenus Brachycistis Fox 



This subgenus contains most of the species and though these may 

 be separated into segregates by more or less marked structural 

 characters the groups are not so clearly differentiated that they can 

 be considered as entitled to subgeneric status. I append a key to 

 these groups and on subsequent pages keys to the species of each 

 group known to me. 



KEY TO SPECIES GROUPS 



1. Second abdominal sternite with a short longitudinal carina at base. 



aequalis group, p. 7. 

 Second abdominal sternite without a longitudinal carina at base 2. 



2. Prepodeum with a sharp carina between the anterior horizontal and posterior 



declivous portions, or with irregular transverse rugae on upper part of hind 

 surface 3. 



Propodeum without a distinct transverse carina or obvious transverse rugae 



as above 4. 



•'3 Second submarginal cell of fore wing almost as long as first; but one round pit- 

 like depression situated diagonally between metathoracic spiracle and suture; 

 hind coxae sharp on postero-ventral (inner) surface, usually with a con- 

 spicuous sharp carina castanea group, p. 9. 



Second submarginal cell of fore wing very much shorter than first, averaging 

 about half as long; two distinct pitlike depressions between the meta- 

 thoracic spiracle and suture, one much above the other, postero-ventral 



margin of hind coxae rounded carinata group, p. 10. 



4. Fore wing with but two submarginal cells brevis group, p. 11. 



Fore wing with three submarginal cells o. 



