44 MYCETOPHILIDJ:. 



stout ; subcostal vein not extending much beyond the areolet, con- 

 nected with the radial before the areolet, which is very small ; fork of 

 the praebrachial vein with a very short petiole, almost sessile ; pobra- 

 chial vein entire. Halteres with a blackish-brown knob. Abdomen 

 brownish. Posterior tibire with short, but distinct little spines. The 

 whole stature with the antennae and legs shorter than in S. rufa ; veins 

 of the wings stouter, and differently arranged. 



Very rare. Has been found once in Tullymore Park, County 

 Down. In Mr. Haliday's collection. (I.) 



Genus VII. TETRAGONEURA. 



TETRAGONEURA, Winn. Ent. Zeit. Stett. vii. 18 (1846). Sciophila p., 

 Meig. ; Curt. Mycetophila p., Meig. 



Corpus gracile, elongatum. Caput parvum. Oculi rotundi. Ocelli 

 ires, lineam paullulum curvatam efficientes, intermedius paullo minor. 

 Proboscis brevis. Palpi exserti, incurvi, 4-articulati. Antennae fili- 

 formes, porrectse, subcompressae, 6-articulatae, corporis diraidio non 

 longiores ; articulus primus cyathiformis ; secundus cupuliformis ; 

 tertius et sequentes cylindrici. Thorax ovatus. Aloe obtusse, in- 

 cumbentes, parallelae, sat latae, areolis duabus cubilalibm. Abdo- 

 men segmentis 7. Pedes longiusculi ; coxae elongatse ; femora com- 

 pressa ; tibiis apice calcaratae, posticas spinosse. Mas. Abdomen 

 cylindricum, forcipe brevi. Fcem. Abdomen subcompressum, acumi- 

 natum. 



Body slender, elongated. Head small, round ; vertex broad. Eyes 

 round. Ocelli three, forming a curved line on the front, the middle one 

 rather smaller than the others. Proboscis short. Labium short, fleshy, 

 bifid, and hairy in front. Palpi four-jointed, porrect, curved; first 

 joint very small; fourth long, filiform. Antennae sixteen-jointed, por- 

 rect, curved ; first and second joints bristly ; first cyathiform ; second 

 elongate, cyathiform ; third and following joints short, cylindrical. 

 Thorax oval, convex. Scutellum small, obtuse behind, with long 

 bristles. Wings almost oval, obtuse, incumbent, parallel, longer than 

 the abdomen ; subcostal vein very short ; radial ending at much beyond 

 half the length of the wing; cubital ending at much before the tip of 

 the wing ; subapical forked at beyond the middle of the wing ; fore 

 fork ending at the tip of the wing ; subanal ending nearer the base of 

 the wing; anal not extending to the border of the wing; tico cubital 

 areolets. Abdomen with seven segments. Legs rather long ; coxae 

 elongated ; femora compressed ; tibia? armed with spurs, the hind pair 

 with lateral spines. Male. Abdomen cylindrical, with short forceps at 

 the tip. Fern. Abdomen slightly compressed, acuminated. 



Tetragoneura is nearly allied to Sciophila, but the two genera 

 may be distinguished by the following characters, and by some 



