MYCETOPHILID^. 



ther from the angle of the brachial areolet, but in the others form 

 a petiolated fork, the anterior branch being very short, and nearly 

 transverse, in Platyura, Asindulum, and Ceroplatus. 



"In the second group most of the genera have the petiolate 

 forked vein, which represents the subapical vein, and a second 

 forked vein, the pobrachial with the subanal (the latter wanting 

 in Mycetophila nitida and its affinities). Sciophila and Tetrago- 

 neum have a small areolet, closed by a transverse vein (wanting 

 in the rest), which, though changed in position, appears analogous 

 to the anterior branch of the cubital in Platyura, etc. Lestremia 

 and the allied genera differ from Sciara chiefly by the origin of 

 the subapical vein; the spurless tibiae, shorter coxae, and vacillat- 

 ing number of the joints of the antennae, and evidently four-jointed 

 palpi, approaching, as I think, to Campylomyza, in which the 

 short coxae of the fore pair do not touch the second pair, the 

 subapical vein is simple, and the subanal springs from the pobra- 

 chial, very near the end, forming a short fork. Catoclia is allied 

 to Lestremia, but the difference of the veins is evident. With 

 respect to Epidapus, the disappearance of the ocelli, with the 

 wings and halteres, leaves fewer marks by which to collocate it, 

 but the form of the abdomen, with the sixteen- jointed antennae, 

 place it near Sciara; the spurless tibiae show an approach to 

 Lestremia. 



" The genera then may be grouped thus : 



1 . . BOLITOPHILA. f 1 . . CORDYLA. 



MACROCERA. f MYCETOPHILA. 



MYCETOBIA. BOLETINA. 



DIADOCIDIA. LEPTOMORPHUS. 



2c DITOMYIA. LEIA. 



CEROPLATUS. 2 \ TETRAGONEURA. 



PLATYURA. / 1 / SCIOPHILA. 



ASINDULUM. SCIARA. 



ZYGONEURA. 



EPIDAPUS. 



LESTREMIA. 



CECIDOGONA. 



AN ARETE. 



CATOCHA. 



CAMPYLOMYZA." 

 Haliday, MSS. 



Genus I. MYCETOPHILA. 



MYCETOPHILA, Steeger, Dipt. Dan. (1840); Zett. D. S. Sciara p., 



