MYCETOrHlUD.^. 



137 



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. 

 CEROPI.ATIN^. 



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

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



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



(5) Ceroplatus. 



Antennae nioie elongate, cylindrical; palpi mrdtrattly long (9). 



Platyura. 

 MYCETOPHILINiE. 



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. ......... 9 



