EUCOELINA. 191 



Not uncommon, often found indoors. Clydesdale, 

 Worcester, Dorsetshire. 



Continental distribution : Lapland, Sweden, Ger- 

 many, Italy. 



Sub-family EUCOELINA. 



The cup- shaped fovea on the top of the flat scutellum 

 forms an easy mark by means of which the species of 

 this group may be recognised. In some respects the 

 species show greater structural variation than we find 

 in any other sab-family. The antennae are very diversely 

 formed, particularly in the females, more especially 

 in the apical joints (the apical 9 to 3) being greatly 

 enlarged and thickened ; in the males they are some- 

 times very long and slender. The cheeks may be 

 margined or not ; the prothorax shows some variety 

 in form, and is, in some species, sharply raised on the 

 top. The keels on the median segment are distinct. 

 In only a comparative few of the species are the parap- 

 sidal furrows distinct. Characteristic of the majority 

 of the species is the fact that the base of abdomen 

 bears a more or less thick tuft of white or griseous hair. 

 The metapleuras, too, are frequently densely pilose. 



Not much is known about the history of the Eucoe- 

 lina, but a few species have been reared from Dip- 

 terous pupse ; to wit, E. nigra, Htg. ; E. heptoma, 

 Htg. ; E. emarginata, Htg., from Musca domestica ; 

 E. spinosa, Htg., from Echinomyia /era, Meigen; E. 

 monileata, Htg., from Tachina chalybeata, Meigen ; 

 E. tetratoma, Htg., from a Phasia; E. retusa, Htg., 

 from Tachina tremula, Meigen ; E. codrina, from Eris- 

 talis tenax (cf. Kirchuer, Cat., p. 34). Giraud (Ann. 

 Soc. Ent. Fr., 1877, p. 416) bred Eucoela melanoptera, 

 Htg., from Agromyza abiens and E. minuta, Gir., from 

 Scolytus rugulosus. West wood (Mag. Nat. Hist., viii, 

 p. 178, fig. 17) reared his E. rap& from the tumours on 



