TETAls'OCERA. 165 



pubescente, thorace fulvo-quadrivittato, alia limpidis, venis transversis 

 infuscatis, abdomine piloso. Long. 2^; alar. 6 lin. 



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

 Antennae tawny ; sixth joint black, with rather thick and long pubescence. 

 Thorax with four tawny stripes. Wings limpid; transverse veins slightly 

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

 ing from the pra3brachial transverse to the discal transverse, parallel 

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

 twice its length from the prsebrachial 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. 22 (1805) ; Fal. ; Meig. ; 

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

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



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



stoma subproductum. Antennae porrecta ; articulus secundus longus ; 



tertius conicus, secundo scepe longior. Pedes validi, pilosi. 



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

 rather prominent. Face oblique. Epistoma not prominent. Peri- 

 stoma slightly produced. Proboscis thick. Palpi filiform. Antenna 

 porrect ; second joint long ; third conical, longer 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 ; raediastinal ending at 

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

 length ; cubital very slightly diverging from the prsebrachial between 

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

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

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

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

 with a few bristles. Male. Abdomen nearly linear. Fern. Abdomen 

 subfusiform. 



Most of the species frequent aquatic plants, and their larvae 

 live in the water. 



a. Arista pubescent. 



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



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



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

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

 a a a. Arista plumose with long hairs. Species 7-1.1. 



