44 MYCETOPHILID.E. 



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

 nected witli tlie radial before tbe areolet, which is very small ; fork of 

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

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

 hrowniah. Posterior tibite with short, but distinct little spines. The 

 whole stature with the antenute and legs shorter than in >S'. riifa ; veins 

 of the wings stouter, and diilerently arranged. 



Very rare. Has been found once iu Tallymore Park,. County 

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



Genus VII. TETRAGONEURA. 



Tetragoneura, Winn. Ent. Zeit. Stett. vii. 18 (184G). Sciopldla p., 

 Meig. ; Curt. Mycetophila p., Meig. 



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

 tres, lineam paidlulum curvatam efficientes, intermedius paullo minor. 

 Proboscis brevis. Palpi exserti, incurvi, 4-articulati. Antenna3 fili- 

 formes, porrectse, subcompressac, G-articulatfe, corporis diinidio non 

 longiores ; articulus primus cyathiformis ; secundus cupuliformis ; 

 tertius et sequentes cylindrici. Thorax ovatus. Alee obtusss, in- 

 cumbentes, parallelse, sat latse, areolis duabus cubitalibus. Abdo- 

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

 pressa ; tibiis apice calcaratas, postica3 spinosse. Mas. Abdomen 

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

 natum. 



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

 round. Ocelli Ihree, formbuj a curved line on the front, the middle one 

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

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

 joint very small; fourth long, filiform. Antenna3 sixteen-jointed, por- 

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

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

 Thorax oval, convex. Scutellura 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; two cubital 

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

 elongated ; femora compressed ; tibiae 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 Scioj'^hila, but the two genera 

 may be distinguished by tlie following characters, and by some 



