TETANOCERA. 165 



puhescentey thorace fulvo-quadrivittato, alls Umpidis, venis transversis 

 infuscatis, abdomine piloso. Long-. 2i ; alar. 6 lin. 



Testaceous. Head pale testaceous beneath. Trontalia bright-tawny. 

 ■Antenna tawny ; siMh joint black, icith rather thick and loraj pubescence. 

 Thorax with four tawny stripes. TFing& limpid; transverse veins sVujhtly 

 clouded with brown ; cubital and prsebrachial veins very slightly diverg- 

 ing from the prfebrachial transverse to the discal transverse, parallel 

 from thence to the border ; discal transverse parted by rather less than 

 twice its length from the pra;brachial transverse, and by full half its 

 length from the border. Abdomen very hairy. Tarsi brownish towards 

 the tips. 



Not common. (S.) 



Genus XI. TETANOCERA. 



Tetanocera, Dumr.; Latr. H. N. v. 21. 32 (1805) ; Fal. ; Meig. ; 

 Mcq. ; Zett. ; Loew. Musca p., E. E. S. ; Gmel. ; Pz. Scatophaga 

 p., F. S. A. Volucella p., Schr. ; Schell. 



Corpus oblongum, robustum. Frons depressa. Facies obliqua. Peri- 

 stoma subproductum. AutemKB porrectrB ; articulus secundus longus ; 

 tertius couicus, secundo SfP/pe lontjior. Pedes validi, pilosi. 

 Body oblong, stout. Head full as broad as the thorax. Front flat, 

 rather prominent. Face ol)lique. E])ist()ma not prominent. Peri- 

 stoma slightly produced. Pr(jl)0scis tldck. Palpi fdiform. Antennae 

 porrect ; second joint long ; third conical, lunger or very rarely shorter 

 than the second. Wings moderately broad ; costal vein ending on the 

 hind border at some little distance from the tip of the wing ; subcostal 

 ending at little beyond one-fourth of the length ; mediastinal ending at 

 much before half the lengih ; radial ending at beyond five-sixths of the 

 length ; cubital very slightly diverging from the prfebrachial between 

 the transverse veins, parallel to it from the discal transverse to the 

 border ; discal transverse parted by mucli more than its length from 

 the prscbrachial transverse, and by about half its length or less from 

 the border. Abdomen a little longer than the thorax. Legs stout, hairy, 

 tcith a few bridles. Male. Abdomen nearly linear. Fern. Abdomen 

 subfusirorm. 



Most of the species frequent aquatic plants, and their larvgc 

 live in the water. 



a. Arista pubescent. 



b. Third joint of the antenufc shorter than the second. Species 1, 2. 



b b. Second and third joints of the antenniG of equal length. Sp. 3. 



b b b. Third joint of tlie antennrc longer than the second, Sp. 4, 5. 

 a a. Arista plumose witli short hairs. Species 6. 

 a a a. Arista plumose with long hairs. Species 7-11. 



