LOMATIN.^ 507 



the Bomhylince lie in the rather flattened oblong abdomen, and the absence 

 of dense furry pubescence, as well as the usually shorter proboscis, 

 but in cases of doubt attention should be given to the pronounced loop 

 near the end of the radial vein, and to the position of the discal cross-vein 

 which in the Lomatinm is frequently placed quite near the end of the 

 discal cell, a character which (I believe) is not shared by any other 

 subfamily of the Bomhjlidw, and this discal cross-vein is often sloping in 

 Lomatince ; the absence of any alula or hind angle of the wing is also more 

 usual in Lomatince than in Bomhylince. 



Table of the Palccarctic Genera of LoMATiNJi. 



This subfamily has never been clearly differentiated, and I have 

 removed several genera with a long proboscis and an almost bristly 

 abdomen to the Toxophorince, to which subfamily I have also removed 

 Tomomyza because of its humped figure. Other genera {Plesiocera, 

 Codionus, etc.) are not well known and may not belong here, so that 

 altogether this table is only a tentative one. 



Proboscis short in all Pala^arctic genera. 



1 (4) Anal cell closed, or almost so. 



2 (3) First posterior cell open. 



Pubescence rather scaly. 



Prorachthes. 



3 (2) First posterior cell closed and petiolate. 



Venation almost as in fig. 292, but the discal cross-vein placed 

 at the middle of the discal cell, the radial vein less looped, and the 

 upper branch of the postical vein forming part of the lower margin 

 of the discal cell for a shorter distance. 



CONONEDYS. 



4 (1) Anal cell open, 



5 (10) Discal cross-vein before (or very near) the middle of the discal 



cell. 



6 (9) Upper branch of the postical fork forming the lower margin of 



the discal cell for only about one-fifth of the length of the 

 latter. 



7 (8) Antennai approximated at the base. 



Thorax with obvious pra3sutural, postalar, and scutellar bristles. 

 Hind femora only slightly spinose beneath. 



PLE8I0CERA. 



8 (7) Antennae widely separated at the base. APHOiBANTUS. 



9 (6) Upper branch of the postical fork forming the lower margin of 



the discal cell for a long distance. 



Hind femora not spinose beneath. A little known and unsatis- 

 factory genus. 



Codionus. 

 10 (5) Discal cross- vein much beyond the middle of the discal cell and 

 sloping obliquely. 



