NE.MOTELUS. 25 



Labnim homy, stout, small, liollow, acute. Labium long, slender, 

 geniculated near the base, terminating in 2 very long lobes with mem- 

 branaceous and slightly bristly edges. Antennfe 8-jointed, porrect, con- 

 tiguous, seated close to the tip of the epistoma, diverging, shorter than 

 the head, clothed with very short hairs ; first and second joints bristly, 

 cylindrical or somewhat clavate ; second longer than the first ; third 

 and following joints forming a fusiform fiagellum ; seventh sliort ; 

 eightli stylate. Thorax almost quadrangular, very slightly convex. 

 Scutellvm semicircular, unanned. Wings lanceolate, incumbent, parallel, 

 not iiubescent. Alultc small. Halteres uncovered. Abdomen with 

 5 segments, short, elliptical, flat or but slightly convex, incurved at 

 the tip, broader than the thorax. Legs slender ; ungues short and stout. 



Male. Eyes approximate, I'ed and composed of large facets above, 

 green and of small facets in front. 



Fern. Eyes remote, of small facets. Epistoma longer than that of 

 the male. 



These flies are slow in their movements ; they inhabit flowers 

 or rushes and grasses on marshy ground during the spring and 

 the summer. 



1. uliginosus, L. s. n. ]1. 982.22(1767); Fb. ; Mg. ; Flu.; 

 Mq. ; Ztt. — mut/'cns,Yh. — bifascialus, Mg. ; Ztt. Niger, ihorace albo- 

 bivittato, alis albis, pedibns fulvis, tibiis posticis femoiibusque nigris ; 

 Mas. capite flavo unimacnlato, abdomine albo ad apicem nigro-bi- 

 fasciato subtus nigro-marginato ; Foim. abdomine albo-marginato macuhs 

 albis vittato. Long. 2 ; alar. 4 lin. 



Black ; a white irregular strife along each side of the thorax. Wings 

 white; veins pale tawny. Halteres yellow. Legs tawny ; femora black, 

 with tawny tips ; hind tibise black, tawny at the base and at the tips. 

 Male. Head with a triangular yellow spot above the auteimae. Aljdo- 

 men white ; 2 black bands near the tip ; underside, excepting the disc, 

 black. Fem. Abdomen black above ; border white ; a row of white 

 spots along the back ; sometimes a row of short white bands along each 

 side. 



Generally distributed. Common in salt marshes bv the sea- 

 shore. (E. S. I.) 



2. pantherinus, L. fn. 1783 (1761); Gm. ; Mg. ! zw. iii. 11 .5. 2. pi. 

 25. f. 20 ; Mq. ; Ztt. — marginatus, Fb. ; Pz. ! LI. ; Fin. — uliginosus, 

 Mg. ; LI. ; Pz. ! — muticus, Shr. — marginellus, Gm. ; Fin. Niger, alis 

 albis, pedibus fulvis, tibiis posticis femoribusque nigris ; Mas. ca- 

 pite flavo-unimaculato, abdomine albo ad apicem nigro-maculato subtus 

 nigro-marginato ; Fcem. bdomine supra nigro albo-marginato maculis 

 albis \ittato. Long. If; alar. 3-i- lin. 



Very nearly allied to A^. uliginosus. Black, ^^'ings white ; veins ])ale 

 tawny. Halteres yellow. Legs tawny ; thighs black, with tawny tips ; 

 hind tibifR black, tawny at the base and at the tips. Male. Head with 



VOL. I. E 



