OCCURRING ABOUT HOLYWOOD. 159 



Stigma: face white: thorax with a light ferruginous line down 

 each side : tip of the abdomen, and the whole under side, pale 

 yellow. 



A rare species, inhabiting woods. Holywood, and the vale 

 of Clara. 



Heleodromia. (e Fam. Tachydromiarum^ M.) 



Caput orbiculatum transversum, fronte lata, hypostomate lineari : 

 antennas porrectae, articulo primo minuto 2" glohoso, tertio infun- 

 dibuliformi seta apicali : pedes graciles : coxis anticis elongatis : 

 alse incumbentes parallelae, areola media completa. 



A. Proboscis perpendicularis, capite longior, palpis hrevihus incum- 

 bentibus, 



H. immaculata. Cinerea: antennis pedibusque nigris, alls 

 ferrugineis immaculatis. (Long. .1.) 



Wings as in H. Upunctata, but without the oblique apical nervure : 

 hypostoma narrow silvery: front and thorax inclining to ferru- 



■ ginous : poisers yellow, the tip dusky : hypopygium of $ reflected 

 ventricose. 

 In woods ; rare. 



B. Proboscis brevis crassa subexserta : alee nervo obliqiio apicis. 



H. bipunctata. Cinerea : vitta dorsalifusca, pedibus testaceis, 

 tilis stigmate fusco. (Long. .12.) 



Wings narrower than in the next, the oblique apical nervure longer, 

 and the middle cell narrower, and nearer the base : obscure, vsdth a 

 brown dot beyond the middle of the rib : hypostoma narrow 

 silvery : antennae black, thorax with a dusky stripe down the 

 middle, sides pearly grey : poisers dusky. 



About ditches in summer ; very rare. 



H. stagnalis. Olivacea, subtus scMstacea, genuhus rujis, 

 alarum nervis transversis infuscatis. (Long. .16.) 



Hypostoma silvery : antennae black : front and thorax olive : back 

 of the abdomen blackish, indented at the sides by grey spots : 

 underside slate colour, the thighs glossed with the same : nervures 

 of the wings as in Brachystoma, Meig. Br achy stoma longicornis 

 also resembles the present genus in its elongate fore-coxas, but by 

 its antennae it belongs properly to the preceding family (Empidce). 



