251 



Keys to Subfamilies 



larvae 



1. Head usually deep black, only the antenna 1 sockets and some small 



round spots pale; maxillary palpi not protruded 



Mycetophilinae. 



- — Head pale, antennal sockets surrounded by a black band ; maxillary 

 palpi sometimes protruded (SciopMla) Sciophilinae. 



pupae 



1. Thoracic and abdominal respiratory organs sessile; slender species; 



legs and wings not closely fused together and to thorax 



. . . Mycetophilinae. 



— Thoracic and abdominal respiratory organs elevated ; robust spe- 



cies ; legs and wings closely fused to each other and to thorax .... 

 Sciophilinae. 



imagines 



1. Medio-cubital cross-vein present; radius with 2 branches 



Diadocidiinae. 



— Medio-cubital cross-vein absent 2 



2. Radius with 3 branches, the intermediate one connecting first and 



third usually near base of latter and forming a subquadrate or 

 oblong cell Sciophilinae. 



— Radius with 2 branches Mycetophilinae. 



Subfamily MYCETOPHILINAE 



I have obtained the larvae and pupae of representatives of two 

 genera of this subfamily. The larvae of these genera differ very 

 markedly from each other though the pupae are very similar. 



SUBFAMILY CHARACTERS 



Larva. — Head glossy black ; antennae sessile ; a conspicuous 

 pellucid spot on each side of head below antennae; dorsal sclerite of 

 head gradually tapered from before middle to posterior margin ; max- 

 illary palpi sessile, in the form of a rounded pellucid spot; entire inner 

 margin of maxillae serrated; mandibles with 3 or more strong apical 

 teeth, or with a continuous series of short teeth along one margin. 

 Prothoracic and abdominal spiracles present. Locomotor organs in- 

 distinguishable or well developed, consisting, when present, of 2 trans- 

 verse series of spinules on ventral segments. 



