54 



Illinois Natural History Survey Bulletin 



Vol. 23, Art. 1 



208 



Bl'3 



Fig. 208. — Phylocentropus placidus, front 

 wing. 



Fig. 209. — Neureclipsis crepuscularis, front 

 and hind wings. 



absent or branching from Ra near 

 margin of wing, fig. 210 3 



3. Hind wings with M 3-branched, fig. 



209 Neureclipsis, p. 56 



Hind wings with M 2-branched, fig. 

 211 4 



4. Front or hind wings, or both, with Ra 



present, fig. 210. . . Polycentropus, p. 58 

 Both wings with R2 absent, fig. 211... 5 



215 



216 



_„ 217 



Fig. 214. — Cyrnellus marginalis, maxillary 

 palpus. 



Fig. 215. — Nyctiophylax vestitus, maxillary 

 palpus. 



Fig. 216. — Cernotina Oklahoma, maxillary 

 palpus. 



Fig. 217. — Lype diversa, maxillary palpus. 



Fig. 210. — Polycentropus cinereus, wings. 

 Fig. 211. — -Nyctiophylax vestitus, wings. 

 Fig. 212. — -Psychomyia nomada, wings. 

 Fig. 213. — -Lype diversa, hind wing. 



5. Maxillary palpi with second segment 



long, third only slightly longer than 



second, fifth short, fig. 214 



Cyrnellus, p. 71 



Maxillary palpi with second segment 

 short, third three times as long as 



second, fifth long, fig. 215 



Nyctiophylax, p. 69 



6. Maxillary palpi with second segment 



only one-half to one-third as long as 

 third segment and with the apex en- 

 larged into a small cushion, fig. 216 



Cernotina, p. 72 



Maxillary palpi with second segment 

 as long as third and uniformly cy- 

 lindrical, fig. 217 7 



7. Hind wings with apex evenly rounded, 



fig. 213 Lype, p. 74 



Hind wings with apex tapering and 



somewhat pointed, fig. 212 



Psychomyia, p. 75 



Phylocentropus Banks 



Phylocentropus Banks (1907fl, p. 130). Geno- 

 type, by original designation: Holocentropus 

 placidus Banks. 



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