378 INSECTS, DIPTERA. 



Snout prolonged like a beak. 



Gen. ASINDULUM, RHYPHUS. 

 * Snout not rostriform. 

 * Eyes entire. 



Gen. PLATYURA, SCIOPHILUS, CAMPILOMYZON. 

 +| Eyes notched. 



Gen. MYCETOBIUS, MOLOBRUS. 

 b. Antennae in a perforated club, or almost rasp-shaped. 



Gen. CEROPLATUS. 



II. Antennae of at most twelve joints, shorter than the head and thorax, thick, cy- 

 lindrical, moniliform, or perfoliate ; feet generally short ; wings broad ; three equal 

 ocelli in the greater number. 



5. Floruks. 



1. No ocelli. 



Gen. CORDYLA, SIMULIUM. 



2. With ocelli. 



A. Antennae of eleven joints. 



Gen. SCATHOPSE, PENTHETRIA, DILOPHUS, 

 6. Antennae with eight or nine joints. 



Gen. BIBIO, ASPISTES. 



Gen. CHIRONOMUS, Meig. 



Rostrum very short, bilabiate ; palpi bent ; no ocelli ; eyes elon- 

 gated and approximated posteriorly ; wings with only longi- 

 tudinal ribs, slightly inclined ; feet long, slender, the two an- 

 terior ones inserted near the neck, and longer than the others ; 

 antennae filiform, those of the males furnished with tufted 

 hairs ; larvae aquatic. 



C. plumosus, Fab. Greenish, and the abdomen annulated with 

 black ; wings whitish, with a black point near their middle. 3 

 lines long. Europe, in marshy places. Nouv. Diet. vi. 548. 



Gen. PSYCHODA, Lat. Tipula, Lin. 



Rostrum in the form of a beak, shorter than the head ; no ocel- 

 li ; wings large, oval, inclined, pubescent and fringed ; an- 

 tennae filiform, long, of from fifteen to sixteen globular joints, 

 furnished with verticillate hairs ; feet placed at equal dis- 

 tances. 



P. phalcenoides, Lat. Body cinereous, with the wings fringed and 

 pendant, resembling a small phalsena. Inhabits Europe, in moist 

 places. Nouv. Diet, xxviii. 210. 



Gen. TIPULA, Lat. Lin. 



Antennae almost setaceous, simple, of thirteen joints, of which 

 the first is the largest, and almost cylindrical, the second glo- 

 bular, the others cylindrical, the third elongated ; eyes oval, 

 entire ; no ocelli ; rostrum very short, terminated by two 

 large lips ; last joint of the palpi long and nodulous ; wings 



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