HYMENOPTERA PARASITICA 287 



The genus is unknown in the European and American faunae, although I described 

 a species, Sicrola avihigua, doubtfully as such some years ago. This species, however, 

 as I suspected at the time, has no relation with these insects or with the genuine Proc- 

 totrypids, but forms the type of a new genus, which I have called Sierolomorpha, in the 

 family Cosilidae. 



Mr Cameron characterized three species in this genus, which are here increased to 

 eight species through the efforts of Mr Perkins, who suspects that they are parasitic 

 upon species belonging to the Coleopterous family Cioidae. Mr Froggatt, however, 

 has bred Sierola antipoda Ashmead, in New Zealand, from Cecidomyia fraiienfeldi, a 

 Dipterous insect, and if this record is correct it is more likely that the Hawaiian species 

 will have similar habits, and probably attack Dipterous larvae associated with the 

 Cioidae in the fungi. All other Bethylids, however, whose parasitism is known, attack 

 only Coleopterous and Lepidopterous larvae, and Mr Froggatt's record should be 

 confirmed by others before it is accepted as final. 



Males 7. 



Females. 



Species, or at least more or less of the thorax, yellow or flavo-testaceous, the 



abdomen sometimes black 5. 



Species black, the thorax always entirely black 2. 



2. Legs yellowish, testaceous, or at most with only the anterior coxae and femora 



black or fuscous 4. 



Legs, or at least all the coxae and femora, black or dark rufo-piceous 3. 



3. Scape blackish, the pedicel and joints i and 2 of the flagellum flavo-testaceous; 



legs black, the anterior tibiae and all tarsi yellowish, the middle and hind 

 tibiae dark fuscous or fuscous medially ; flagellar joints 1 to 1 1 a little 



longer than thick (j) S. molokaiensis. 



Scape, pedicel and three or four joints of the flagellum flavo-testaceous; tro- 

 chanters, knees, the anterior and middle tibiae usually, tips of hind tibiae and 

 all tarsi yellowish ; sometimes with all tibiae yellowish ; flagellar joints 

 submoniliform, 3 to 5 wider than long, the following not, or scarcely, 

 wider than long (7) 5. leiiconeura. 



Scape at base and apex, the pedicel and joints i to 3 of flagellum usually 

 flavo-testaceous, or at least yellowish beneath ; trochanters, all tibiae, except 

 sometimes the hind pair medially, and all tarsi, yellowish. 



Joints of flagellum not moniliform, distinctly longer than thick {2) S. montkola. 



Joints of flagellum 5 to 12 moniliform, or submoniliform, not, or scarcely, 



longer than thick (7) 5. leiiconeura. 



4. Anterior coxae and femora more or less black or fuscous, rest of legs 



testaceous or yellowish. 



Clypeus with a highly elevated median carina ; antennae, except the 

 last 5 or 6 joints, brownish-yellow, rarely wholly yellowish ; flagellar 

 joints about twice as long as thick or somewhat shorter, the first being 

 slightly the shortest joint (j) 5. molokaiensis. 



38—2 



