BRUES: PARASITIC EYMENOPTERA. 15 



represents an insect gall. Its size and position on the leaf suggest the 

 cynipid Andricus. In connection with this it is interesting to note 

 that there are in the collection a few insects which are quite probably 

 referable to the recent genus Andricus, most of the living species of 

 which are believed to form galls on various species of Quercus. So far 

 as I can ascertain no galls on Myrica produced by recent species have 

 been described. We can never hope to associate fossil gall-flies with 

 their habitations in a specific way, and it seems justifiable therefore, to 

 give the present gall a specific name. 



Ibalitnae. 

 Protoibalia, gen. nov. 



Head and thorax coarsely sculptured, the abdomen shining, but little longer 

 than the head and thorax together. Ovipositor prominent, at least longer 

 than the abdomen and probably much longer as the tip is not preserved in the 

 type specimen. Antennae of the female filiform, apparently 13-jointed, the 

 apical flagellar joints shorter than the basal ones. Metathorax short, truncate ; 

 scutellum unarmed. Abdomen sessile, elongate oval. Legs moderately stout, 

 the posterior femur broad, but nearly as long as its tibia. Hind metatarsus 

 apparently equal in length to the following taken together. Wings with the 

 radial cell much shorter and broader than in Ibalia; three submarginal cells, 

 the first large and indistinctly closed below, second very small, third open. 



A most remarkable genus which combines characters of Ibalia and 

 certain true cynipines. In habitus it is somewhat suggestive of Leucos- 

 pis, in fact after a preliminary examination of the reverse which does 

 not show the wing, I had labeled it "related to Leucospis?" 



Type. — P. connexiva, sp. nov. 



Protoibalia connexiva, sp. nov. (Fig. 8.) 



Female. Length 5 mm. Yellow, varied with black. Antennae brownish, 

 legs basally and the posterior pair almost entirely dark; abdomen with the 

 segments dark below and apically. Head rugose punctate; antennae slender, 

 of equal thickness throughout, except for the swollen scape. Pedicel less 

 than one-half as long as the first flagellar joint which is about four times as 

 long as thick; second longer than the first; following growing shorter.* Thorax 

 roughly sculptured, the mesonotum transversely rugose; propleurae irregu- 

 larly so. Metathorax and probably also the scutellum rugose. Abdomen 



