MYCETOPHILID.^. I37 



2. Furcation of third vein more proximad than that of the fourth. 



Ditomyia. 

 Furcation of fourth vein more proximad than that of the third (14) 



Plesiastina. 



1. Face and proboscis prolonged, snout-iike. . Asindulum. 

 Face and proboscis not produced. ...... 2 



2. Antennae shorter than the head and thorax, flattened; palpi short 



(5). ........ Ceroplatus. 



Antennae moie elongate, cylindrical; palpi moderately long (9). 



Platyura. 

 MYCETOPHILIN^S. 



1. Three ocelli present. ........ 4 



Two ocelli, one situated near the margin of each eye. . . 2 



2. The costal vein is continued beyond the tip of the third vein. 



Eudicrana. 

 The costal vein reaches only to the tip of the third vein. . 3 



3. Auxiliary vein vestigial, projecting only a short distance beyond 



the humeral cross-vein; furcations of fourth and fifth veins near- 



ly opposite each other (15) . . ... Mycetophila. 



Auxiliary vein complete, longer than the humeral cross vein; end- 



ing in first vein (17) ...... Dynatosoma. 



4. Auxiliary vein complete, terminating in the costa. . . 5 

 Auxiliary vein not terminating in the costa, rudimentary or ter- 



minating in the first vein. ....... 12 



5. Proboscis much elongated ..... Gnoriste. 

 Proboscis short. ..... ... 6 



6. Auxiliary vein connected by a small cross-vein with the first longi- 



tudinal. .......... 7 



Auxiliary vein not connected by a cross-vein with the first longi- 

 tudinal. ......... Leia. 



7. Fifth vein furcate. ......... 8 



Fifth vein simple, not furcate. .... Acnemia. 



8. Origin of the third vein perceptibly past the middle of the wing, 



the anterior cross-vein longer than the distal section of the first 

 vein (13). . . Neoglaphyroptera. 



Origin of the third vein distinctly before the middle of the wing, 

 the anterior cross-vein much shorter than the distal section of 

 the first vein. o 



