NO. 1206. ICHNE UMON FLIES— A SUMEA D. 3 7 



Plujijadeiumini^ where, in fact, Forster had already placed some of 

 th(>ni under different oeneric names, nauiel}": Sfiheutcs^ Pe20j)orH^^ 

 Phyrfus, and Chmncezelus. Aptei^is Forster, as orig-inally defined, 

 seems to have included some if not nuM of these forms. The name, 

 th(M-efore, may have to disappear entirely, since all of the species 

 placed here by Forster that I have had for examination belong to 

 other genera, in a different tribe. 



Aiji'othercutes Forster also can not he retained in this tribe. It is 

 removed to the tribe Orypt'tni. 



In this group the females, so far as my own oliservations go, seem 

 to be always wingless or sul)apterous, never fully winged, while the 

 males are most frequently fully winged, although wingless males are 

 not rare. Both in this country and in Europe the males have T)een 

 frequently mistaken and described as species of TTemiteles, and at 

 present many of them will be found in our catalogues under that 

 genus. 



The strongly inwardly curved basal nervure of the front wings, 

 together with the ])road triangular stigma, will, however, easily sepa- 

 rate them from genuint^ Ifemitelmi. 



TABLE OF GENERA. 



\Vinged species (males) 5 



Wingless or subapterous. 



Ovipositor elongate, usually longer than half the length of the first abdominal 



segment, the second segment normal 2 



Ovipositor much abbreviated, either scarcely exserted or so short that it does 



not attain half the length of the first abdominal segment. 



Setujnd alxlominal segment very large, occupying most of the surface of 



abdomen; metathorax abru])tly, obliquely truncate behind, the 



truncature superiorly bounded by a sharp carina; petiole very long 



and slender, not widened at apex (236) Thaumafotypus Forster. 



Second abdominal segment normal ; petiole widened at apex. 



Metathorax sloping from the base; first joint of the flagellum longer 



than the second (237) Creinnodes Forster. 



Metathorax not sloping from the base; first joint of the flagellum not 

 longer than the second (238) Ajifeniplnjg^is Forster. 



2. Scutelhnn wanting 4 



Scutellum i)resent 3 



3. Uudimcntary Mings usually extending t ) or beyond the l)ase of the metathorax ; 



first abdominal segment i)unctured, not longitudinally aciculate, or 

 striate (239) Apinii^ F()rster. 



Uiidiiiientary wings not extending to base of metathorax, often scale-like; first 

 al)dominal segment more or less longitudinally striate, longitudi- 

 nally wrinkled, or opaque, c(jriaceous (240) Tlwroficoims Fcirster. 



Wings wanting; metathorax with thea])ical transverse carina i)resent; abdomen 

 with 6 dorsal segments, the second and third large, sutH'iiual, tlie 

 first not longitudinally striate (241) PezomarhuK ( iravenhorst. 



4. Face of the usual length (241 ) Pezomachns ( iravenhorst. 



Face nuich abl)reviated (242) rczidurhus Forster. 



5. Transverse median nervure in liind w ings l>roken far below the middle. 



(240) Tlwrosropns l^^iirster. 



