.'i:* TIIK CAX.VUIAS HXTOMoUMtlKT. 



the sheaih ; the sheath and ccrci arc clothed with rather long haiis. 

 ('clour black and ferruginous ; antenna- black, somewhat paUid beneath 

 apically : a spot from the ocelU to the occiput, and the back of the head, 

 black ; thorax above, pectus, lower part of the pleurfe. "posterior plate of 

 the epimeron' ? (Marl. N. Am. Nematin.-c). a spot in the middle of all of 

 ihc abdominal segments above, the apex of the sheath, black ; the tips of 

 the tarsi and tibia* somewhat dusky. Wings hyaline, iridescent ; veins 

 brown or pale brown, basal half of the stigma pallid. 



Male: Length. 4 75 mm. The sculpture and shape of the head is 

 much like the female ; the clypeus is not .so deeply notched, there is a 

 more or less distinct sulcus from the anterior ocellus to the middle fovea, 

 the antennai are longer and covered with short hair, and the colour is 

 somewhat darker. The procidentia is prominent and truncate at the apex ; 

 the hypopygidium is long and narrowed toward the apex. Colour black ; 

 all the orbits, clypeus, middle carina, tips of the pronotum, tegulae. venter 

 of the abdomen, and legs below the base of the cox;e reditish-yellow ; 

 apex of the posterior tibia; and their tarsi black ; antennje a little paler 

 beneath, at the apex. Wings hyaline, iridescent ; venation and stigma 

 brown, extreme base of the stigma pale. 



Gall : Length, i 2 to 20 mm.; width, 5 to u mm.; height, 4 to 4.5 

 mm. ; a lateral swelling on the twig, never very abrupt, generally gradually 

 tapering off at each end ; when dry, roughened longitudinally ; always 

 monothalamous ; adult leaving the gall from an opening in the side; bark 

 of the twig when dry reddish-brown ; occurs on Scilix sp. 



Var. .\ — Two females have the stigma pale brown, and most of the 

 pleurze black, and the head is coloured like the male. 



Type locality: Claremont, California. Many males and females 

 bred from galls, and a few specimens collected by C. K. Haker. 



This species is near l>el>bian<c, Rob., but it differs from that species 

 as follows : Female : Occiput rounded above the eyes ; middle fovea 

 elongate ; a spot on the pleur.x pale, and the apical antennal joint is more 

 acute at the apex. Male : The occiput is more .Mrongly rounded above 

 the eyes ; the middle fovea is deep elongate ; the frontal crest is not 

 nearly as prominent ; the apical antennal joint is more obtuse at the apex ; 

 the procidentia is narrower, longer and more prominent. The gall is not 

 as abrupt as the gall of hflbiamr, and undoubtedly occurs on a difTerent 

 species of Sa/tx, 



