154 CATALOGUE OF DIPTERA 



L. demissa. Fusco-cinerea ; thorace trivittato, alls stigmate 

 fusco. (Long. .3; dilat. .7; antennae, 3'. 12.) 



Wings as in division U. (Z. immaculata) but the subcostal nervure 

 is connected with the 1st of the apex by two transverse nervures, 

 and the first branched one of the margin has a shorter fork : an- 

 tennae of 13 joints longer than in L. immaculata: in the male 

 the antennae are tv?ice as long, with very distinct oblong 

 compressed joints : the antennas, feet, and abdomen are dusky : 

 legs longer than in L. immaculata. 



L. pavida. Obscure fiavida : thorace trivittato, anfennisfuscis, 

 alls ht/alinis, stigmate pallido. (Long. .26 ; dilat. .6.) 



Wings as in the last ; but the first of the two nervures that are 

 forked in that, is in this unbranched ; the nervures are delicately 

 pubescent : the wings hyaline, with a very pale brown stigma : 

 the form slender, as in Z. tenella : the legs long and slender : the 

 borer of the female reddish. 



Dicranomyia oscillans. Flavido-cinerea ; dorso obscuriiis, alts 

 cerulescentibus, nervis fusco limbatis, maculls tribus costts 

 distinctioribus. (Long. .28 ; dilat. .68.) 



First joint of the antennaa, and the legs, are pale yellow, the ends 

 of the thighs and shanks dusky : the back of the pro thorax and 

 of each humeral lobe brownish : wings bluish hyaline : the 

 nervures, as in D. chorea; but the 1st longitudinal springs nearer 

 the base, all are very delicately pubescent ; those of the margin, 

 the transverse, and the 3d longitudinal, are bordered with brown : 

 the stigma diffused brown, produced backwards, as in D. chorea^ 

 another spot surrounds the origin of the 1st longitudinal nervure, 

 and a third is placed at an equal interval along the subcostal 

 nervure, the portion of which within the spots are nearly black. 



I found this species abundantly on the ascent of Sliebh 

 Donard, resting on the underside of rocky masses in the shade, 

 swinging itself constantly on its long legs as a carriage on its 

 springs. It has also occurred at Holywood. 



Geranomyia. {e Tipulariis rostratis. Meig.) 



Antennae 14-articulatae : articulo 1° cylindrico, 2° cyathiformi, 



reliquis globosis decrescentibus : proboscis porrecta, rigida, 



longitudine thoracis, ante medium palpigera : palpi brevissimi 



exarticulati : alaj incumbentes parallelae : oculi subtus contigui. 



