650 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxix. 



e. Front wings with the Vjase of the third anal vein present and the second 

 anal cell therefore not combined with the third. 

 /. Front wings with the medio-cubital cross-vein and the vein IMs+i par- 

 allel, or at least not divergent ])ehind. 

 g. Front wings with the medio-cnbital cross-vein and the vein M3+1 

 parallel; media separating from radius at the base of the cell M^; 

 the radio-medial cross- vein rarely, if ever, wanting; hind wings with 



the cell Iln-2 extending to the apex of the wing Tenthredini>'.e 



r/g. Front wings with the medic-cubital croas-vein and the vein M3+4 

 strongly divergent before; media separating from radius at or near 

 the middle of the cell M^; the radio-medial cross-vein always want- 

 ing; hind wings with the cell Ri+a ending a considerable distance 



before the apex of the wing Cimbicix.e 



ff. Front wings with the medio-cubital cross-vein and the vein M3+4 



strongly divergent behind Hoplocampin.e 



ee. Front wings with the base of the third anal vein atrophied and the 



second and third anal cells therefore united Dixeurin.e 



cc. Radial cross-vein wanting. 



d. Front wings with the third and combined first and second anal veins anas- 

 tomosed at middle for a short distance, the length of the coalescence 

 always being less than the length of the second anal cell. 

 e. Hind wings with the vein Rj reaching the margin before the apex of the 



wing; the cell R1+2 pointed at apex and closed Cladiin.e 



ee. Hind wings with the vein R3 reaching the margin at the apex of the 



wing; the cell R1+2 broad at apex and open Monoctenin^e 



dd. Front wings with the third and combined first and second anal veins 

 anastomosed at middle for a considerable distance, the coalescence being 

 two or three times the length of the second anal cell or the second anal 

 cell wanting or combined with the third anal cell. 

 e. Front wings with the portion of the free part of Mj situated between the 

 apex of the vein M3+4 and the basal end of the medial cross-vein always 

 more than one-half, usually subequal, and frequently greater in length 

 than the free part of the vein M4, causing the cell M^ to appear distinctly 

 longer longitudinally than transverseh'; the free part of the vein 

 M^-f Cui perpendicular to the first anal vein, if oblique, inclined toward 

 the apex of the wing. 

 /. Front wings with the free part of the vein Sci present. 



g. Front wings with the cell R1+2 never appendiculate, closed at apex 



and not reaching the apex of the wing Nematin.e 



gg. Front wings with the cell R1+2 appendiculate at apex or open, never 

 closed at the wing margin before the apex of the wing. 



HvLOTOMIX.E 



f. Front wings with the free part of the vein Scj alwaj's wanting. 



Schizocerix.e 

 ee. Front wings with the portion of the free part of the vein M3 and the 

 basal end of the medial cross-vein always less than one-half and gener- 

 ally not more than one-fourth or one-fifth the length of the free part of 

 the vein M^, causing the cell M^ to appear longer transversely than 

 longitudinally; the free part of the vein M^-fCui oblique and always 



inclined toward the base of the wing Perreyiix.e 



au. Front wings always with both the first and second anal cells wanting. 



/>. Front wings with the free part of the vein M^+Cui distinctly beyond the pos- 

 terior end of the medio-cubital cross-vein. 

 c. Hind wings with the cell Ri+2 distinctly appendiculate. 



