THE CANADIAN ENTOMOLOGIST. 43 



cubitus in hind wings originating beyond the transverse median 



nervure Fedtschenkia, Saussure. 



(Type F. grossa, Sauss.) 

 Head transverse, seen from in front longer than wide; the eyes large, 

 occupying the whole side of the head, and extending from base of 

 mandibles to vertex ; mandibles bidentate, the outer tooth much 

 longer than the inner; maxillary palpi 4-jointed, labial palpi 3-jointed; 

 antennfe 12-jointed, rather long, the flagellum subclavate, inserted 

 on the anterior margin of the head ; pronotum considerably longer 

 than the mesonotum, the latter with two widely separated furrows ; 

 scutellum fully one-third longer than the mesonotum ; metathorax 

 long, obliquely rounded off posteriorly ; abdomen fusiform, a little 

 longer than the head and thorax united, with a constriction between 



the first and second segments Isotiphia, Ashmead, gen. nov. 



(Type I. nigra, Ashm.) 

 I. Isotiphia nigra, sp. nov. ? . — Length 4 mm. Polished black, 

 the head and the mesonotum with some sparse punctures, the metathorax 

 rugulose ; antennse brownish, towards apex black; tips of tibiae and 

 tarsi testaceous ; wings hyaline, with a fuscous cloud through the 

 discoidal cells, and another through the second and third cubital 

 cells and the disk of the wings. 



Brazil : Sanlarem. One specimen. 



Family XXXIX.— Rhopalosomidse. 



The writer established this family in 1896. It was based upon Rho- 

 palosoma Poeyi, Cresson, a most singular looking wasp, that, on account 

 of its colour, the subemarginate eyes and the prominent ocelli, resembles 

 an ichneumon-fly of the subfamily Ophionime. Mr. Cresson described it 

 as a Braconid. It is, however, a true aculeate, and shows some affinity 

 with the Myrmosidct and Mnti/Iidce, through such genera as Brac/iyci^tis, 

 Tric/iolabioides, Fhoiopsis, Magrettina, etc. 



The family was very fully discussed in my paper entitled " Rhopalo- 



somidye, a new family of fossorial wasps," published in the Proceedings of 



the Washington Entomological Society, Vol. III., 1896, pp. 303-9. 



The only genus known may be recognized by the following charac- 

 ters : 



Eyes emarginate within; antenn^ie long, slender, the joints of the flagellum 

 long, cylindrical, each joint with two spurs at apex within ; front wings 

 with two oblong, closed cubital cells, the second receiving the recurrent 



