186 DOLICHOPID7E. 



of the colour appearing more evidently thickened after the junction 

 of the subcostal. Halteres pale yellow. Abdomen dark brassy-green, 

 with blackish pubescence above. Lamella rounded at the tip. Legs 

 dark brassy-green, tarsi black ; fore coxse yellowish ash-colour, with a 

 few bristles at the tip ; the pubescence on the underside of the femora 

 and fore metatarsus, and at the tip of the hind tibia, yellowish ; fore 

 femora pectinated beneath from the base to the middle, and in front of 

 this beset with shorter spines, continued in a single row to the tip ; 

 tibia with the sharp inner edge thickly beset with short spines in a 

 single row, only the last one at the tip doubled ; fore tarsus scarcely 

 longer than the tibia. 



Common on pools, particularly in the neighbourhood of the 

 sea. (E. S. I.) 



8. praecox, Lhm. ! act. acad. dec. 2. xii. 243 (1824). viridis,~M.g. 

 oceanits, Mq. Pallide virescens,fronte thoraceque supra olivaceis, ab- 

 domine cano-pubescente, halteribus pallidis, hypostomate candido. Long. 

 1^; alar. 5 lin. 



Hoary greenish, with little metallic lustre. Front blackish. Face 

 glossy white ; beard white ; cheeks expanded less than in the preceding. 

 Arista very short, black, the outer half of the last joint attenuated, 

 paler, the tip capillaceous. Thorax above olive. Wings hyaline ; veins 

 dusky, the costal and subcostal ferruginous. Hnlteres pale yellow. 

 Pubescence of the abdomen and legs pale, except that on the upper side 

 of the femora. Lamella small. Fore legs not so short as in the pre- 

 ceding ; the tarsus much longer than the tibia ; coxae unarmed ; femora 

 bipectinated ; the inside of the tibia, except at the base, with a single 

 row (close set) of minute spines, the last one slender. 



Abundant on the shallow pools left on the sandy shores of 

 Lough Neagh, in the summer. (I.) 



9. litoreus, Ztt. d. s. 3051 (1849); Fin. p. aquaticus, Mg.? 

 Obscure viridis subtus canus, fronte thoraceque supra olivaceis, hyposto- 

 mate candido, halteribus apice fuscis ; Mas. femoribus anticis sub apice 

 spinulis ternis compressis luteis. Long, li ; alar. 4 lin. 



Dark bluish-green, beneath hoary. Front blackish. Face silvery- 

 white, rather narrow above. Arista short, blackish, the very tip alone 

 capillaceous. Thorax olive in front, brassy-green behind. Wings hya- 

 line ; veins blackish. Halteres pale, with a dusky spot at the tip. Ab- 

 domen with blackish pubescence above. Legs blackish-green. Fore 

 pair moderately long ; COXBB unarmed, with pale pubescence ; femora 

 pectinated beneath in the first half, and armed with three obtuse com- 

 pressed yellowish spines towards the tip, in the male ; tibia inside pec- 

 tinated with short and fine spines, which are scarcely distinguishable 

 in its upper half; tarsus scarcely longer than the tibia. 



Bare. (E. I.) 



10. ineequalipes, Ztt. d. s. 444. 4 (1843). pmcox, Mg. lito- 



