190 



Not so common as the two preceding, but generally diffused. 



(E. S. I.) 



4. armatus, Ztt. d. s. 3093 (1849). -prodromus, Hal. Fusco- 

 cinereus, coxis anticis pedibusque ferrugineis, tarsisnigricantibus, antennis 

 subacutis ; Jiypostomate albido, Foem., aut lutescente, Mas. ; femoribus 

 intermediis subtus ciliatis, tibiis arcuatis pectinatis. Long. 1 ; alar. 

 2^ lin. 



Cinereous; front sometimes slightly bluish. Face tawny-yellow in 

 male, yellowish-white in female. Antennae with the third joint rather 

 long, and acute triangular in male. Thorax above tinged brownish or 

 ferruginous, opake ; scutellum bluish. "Wings brownish. Abdomen 

 faintly brassy-green. Legs and fore coxes ferruginous, tibia3 with a 

 blackish dot at the base and tip, tarsi almost entirely blackish ; hind 

 metatarsus scarcely shorter than the following joint. In the male the 

 intermediate femora are thickly ciliated beneath, the tibice curved and 

 pectinated behind with long erect bristles. 



Common on the sea-coast, even early in the spring. (E. S. I.) 



5. pusillus, Mg. iv. 65. 11 (1824) ; Mq. jEiiwoite-mger, fronte 

 cyanescente, genubus fernn/im'is, halteribus nigris ; Jiypostomate cano, 

 Foem.,aut atro, Mas. ; tarsis anticis apice dilatatis, femoribus intermediis 

 apice tibiisque basi pectinatis. Long. 1 ; alar. 3 lin. 



Slack, slightly brassy. Front steel-blue. Face deep black in male, 

 hoary in female. Cilia of the orbit black. Antennae with the third 

 joint rather acute triangular in male, obtuse in female. Scutellura 

 bluish. Wings dusky, with the dot very faint. Halteres blackish at 

 the tip at least. Legs dull black, femora ferruginous at the tip. In 

 the male the last two joints of the fore tarsus are dilated ; the fourth 

 oval, hairy beneath ; the intermediate femora finely ciliated beneath in 

 a double row, and pectinated behind near the tip ; the tibia compressed 

 and somewhat curved, close to the base a little tooth, pectinated beneath, 

 and in front a tuft of hairs sloping backwards. 



Eare in marshes. In Mr. Halida/s collection. (I.) 



6. alpinus, Hal. e. m. i. 163 (1833). Fcem. atomus, Ztt.? Oliva- 

 ceus, fronte cyanea, Jiypostomate argenteo, pedibus fusco-ferrugineis, alis 

 nigricantibus disco liyalinis ; Mas. oculis contiguis, femoribus intermediis 

 infra apicem spinulosis, alis subpetiolatis. Long. |- ; alar. 2-i- lin. 



Olive. Front steel-blue. Face very narrow, silvery-white-, in the 

 male it is produced over the mouth, and the eyes meet under the 

 antennas. Antennas with the third joint obtuse triangular in male, 

 rounded in female. Scutellum steel-blue. Wings narrow, blackish, 

 with the disc nearly hyaline around the clouded transverse vein and the 

 dot of the subapical. In the male the wings are much narrowed towards 

 the base, almost petiolated, the outer veins more darkly bordered, the 

 subapical vein diverging from the cubital much as they approach the 

 tip. Legs and fore coxas dark reddish ; the base of the coxae, the 



