MICBODON. 239 



Body broad. Head a little broader than the thorax. Antennae 

 longer than the head, seated on a tubercle ; first joint cylindrical ; 

 second clavate ; third tapering from near the base to the tip, almost 

 twice the length of the first and the second ; fourth very short, sealed 

 on the Up of tlie third', fifth stylate. Thorax elliptical. Wings with 

 the subapical areolet gradually widened from tlie base outwards. Abdo- 

 men obconical. 



1. anea, Fb. s. i. ii. 413. 4 (1781); Gm.; Mg. pi. 26. f. 20; 



Pz. ; LI. ; Mq. ; Ztt. ; Hdn. amea, Rsi. ; lldn. Nigricans, abdornine 

 eeneo, genubus tibiis tarsisque ferrugineis, antennarum articulis primo et 

 secvitdo subaeguilongis. Long. 5 ; alar. 11 lin. 



Blackish. First and second joinls of the antennae of equal length. 

 Abdomen ceneous. Knees, tibice, and tarsi ferruginous. 



Very rare ; has been found near Petersfield, Hampshire. In 

 Mr. Curtis's collection. (E.) 



Genus III. MICRODON. 



MTCRODON, Mg.; 111. mag. ii. 275 (1803); Mg.; Fin.; Ct.; Ztt. 

 Mnsca p., L. ; Dg. ; Shr. i. a. Stratiomys p., Shr. ; Pz. Syrphns 

 p., Fb. e. s. Mulio p., Fb. s. a. Aphritis, LI. ; Lch. ; St. F. et 

 Srv.; Mq. 



Atdend(B criicnlo qnarto dorsali. Ala areola subapicali transverse 



bisecta. 



Body short, broad, thick. Head short, obtuse, semicircular, as 

 broad as the thorax, much compressed in front ; epistoraa very flat, 

 convex ? pilose ; peristoma small, oval. Eyes parted. Proboscis nearly 

 vertical, not longer than the head. Labrum short, robust, obtuse, 

 narrow in front. Lingua acute, very slender, as long as the labrum. 

 Palpi cylindrical, very small, hardly visible. Labium cylindrical, much 

 dilated. Antennae 5 -jointed, porrect, contiguous, seated on a hardly 

 perceptible elevation, somewhat longer than the head ; first and second 

 joints armed with fine spines ; first long, cylindrical, slender at the 

 base, almost as long as the two following; second and third com- 

 pressed; second cyathiform; third acute, broad at the base; fourth 

 very short, seated very near the base of the third; fifth setiform, as long 

 as the third. Thorax nearly round, slightly quadrate; scutelluni semi- 

 circular ; hind border emargiaate, armed with tAvo little spines. Wings 

 very finely pubescent, a little shorter than the border, incumbent and 

 almost parallel in repose; subapical areolet bisected transversely; alulas 

 small. Halteres small, distinct. Abdomen obconical, broader and 

 longer than the thorax. Legs rather stout, pubescent ; tibiaa slightly 

 curved. Male. Eyes more contiguous than in the female. 



