ABT. 3 WASPS OF SUBFAMILY BRACHYCISTIINAE MALLOCH 23 



5. Posterior ocelli separated from eye by at least 1.5 as great a distance as the 



transverse diameter of either ocellus (see rnicrommata group.) 



Posterior ocelli separated from eye by much less than 1.5 as great a distance 

 as transverse diameter of either ocellus 6. 



6. Anterior elevations of gular carina large, a line drawn across their highest 



points would pass distinctly behind the mandibular condyles; small brown- 

 ish-orange species with black head indiscreta Fox. 



Anterior elevations of gular carina moderate in height, a line drawn trans- 

 versely across their highest points would pass over the mandibular condyles, 

 sometimes beyond their highest points 7. 



7. Space between antennal socket and eye not over half as wide as socket 



(see inaequalis group.*) 



Space between antennal socket and eye well over half as wide as socket 8. 



8. Propodeum short and broad, the horizontal anterior part broader than long, 



rather sharply marked off from the precipitous posterior portion and the 

 sides; basal segment of abdomen seen from the side of its highest part 

 about two-thirds as high as its length on lateral suture; an arcuate frontal 



carina over each antenna; head brownish orange triangularis Cresson. 



Propodeum longer, sloping downward from about middle; basal segment of 

 abdomen seen from the side not half as high as long; no arcuate frontal 

 carinae over antennae; head black or fuscous, much darker than thorax 

 dentata Bradley. 



BRACHYCISTIS (BRACHYCISTIS) IMITANS, new species 



Male. — Head black, mandibles and antennae brownish orange. 

 Thorax dark castaneous, paler on sides of prothorax and of nieso- 

 notum, the tegulae brownish-yellow. Abdomen castaneous, blackish 

 apically. Tip brownish yellow, stigma fuscous. 



Posterior ocelli at distinctly less than their transverse diameter 

 from eye; space between eye and antennal socket a little narrower 

 than socket; clypeus hardly elevated in center, the edge but little 

 bevelled; carina from inner tooth to base complete and sharp, with 

 a distinct angle near base; gular carina not obviously deflexed out- 

 wardly at apex, distant from edge about two-thirds of width of gular 

 orifice. Mesopleura distinctly punctate; propodeum not as elongate 

 as in atrata, the hind margin more abruptly declivous, surface not 

 polished above but closely shagreened, the hind margin and upper 

 part of sides with many setiferous punctures. First abdominal seg- 

 ment over 1.5 as long as its apical width, marginal cell as in Figure 

 23. Hind tibia without pronounced dorsal bristles. 



Length, 7 mm. 



Holotype. — Los Angeles County, Calif., September (D. W. Coquil- 

 lett). 



Type.— Cat. No. 27927, U.S.N.M. 



BRACHYCISTIS (BRACHYCISTIS) ATRATA (Blake) 



This species as I interpret it is usually shining black in color, 

 with the lower half of face, tibiae, and tarsi, and usually the pro- 



» For description see under inaequalis group. 



