16 STRATIQMIDjE. 



Ztt.potamida, Mg.; Mq. Nigro-senea, capite flavo-bimaculato, scu- 

 tello flavo aut fulvo bidentato, alls subcinereis basi et ad costam sub- 

 fulvis, abdomine nigro flaw-fasciato et utrinque maculato, ventre flavo, 

 pedibus fulvis, femoribus nigris, tibiis nigro-fasciatis. Long. 6-7 ; alar. 

 12-14 lin. 



JSneous-black, thickly clothed with tawny hairs. Head with 2 

 yellow spots in front. Proboscis dark brown. Antennae black, about 

 twice the length of the head. Scutellum yellow or tawny, armed with 

 2 tawny teeth. Wings very pale grey, with a tawny tinge at the base 

 and along the fore border. Halteres yellow, with a brown ring near the 

 base. Abdomen above deep black, marked with yellow : a large trian- 

 gular spot on each side of the first segment ; an often interrupted band 

 on the second ; a band on the third, and a spot at the tip ; underside 

 yellow, with 4 more or less interrupted black bands. Legs tawny ; 

 femora black ; a black band on each tibia. Male. Spots on the front 

 smaller than in the female. Fern. A narrow interrupted yellow band 

 behind the eyes. 



Generally distributed. (E. I.) 



3. furcata, Fb. e. s. iv. 264. 5 (1792); Harris, exp. xii. 2. fig.; 

 Mg.; Mq. ; Ztt. chameleon, L. ; Shr. ; Pz. fn. ! viii. 24 ; var. Ro. 

 etr. -panthaleon, Tin. Nigra, alis subcinereis basi et ad costam fulvis, 

 abdomine fulvo-l -maculato, ventre flavo-quinquefasciato, tibiis basi 

 tarsisque fulvis; Fcem. capite flavo-unimaculato, scutello fulvo nigro- 

 marginato. Long. 6-7; alar. 12-14 lin. 



Black, thickly clothed with tawny hairs. Proboscis dark brown. 

 AntennaB almost twice the length of the head. Wings pale grey, 

 tawny at the base and along half the breadth beneath the fore border. 

 Halteres tawny. Abdomen with 3 more or less triangular tawny spots 

 an each side and 1 at the tip ; underside with 5 yellow bands. Tibiaa 

 towards the base and tarsi tawny. Fern. Head with a yellow spot 

 behind. Scutellum tawny, black along the fore border, armed with 2 

 tawny teeth. 



Generally distributed. (E. I.) 



4. riparia, Mg. zw. iii. 138. 6 (1822) ; Mq. strigata, Mg. kl. 

 Nigra, scutelli margine postico fulvo bidentato, alis fulvis, abdomine 

 albido-1 -maculato, ventre flavo-quinquefasciato, pedibus nigris, tibiis 

 apice tarsisque fulvis, tarsis anticis obscure fulvis. Long. 4-^5 ; alar. 

 9-10 lin. 



Black, thickly clothed with tawny hairs. Proboscis dark brown. 

 Scutellum tawny along the hind border, armed with 2 tawny spines, 

 whose tips are black. Wings tawny, paler along the hind borders and 

 at the tips. Halteres tawny. Abdomen with 3 narrow whitish spots 

 on each side and one at the tip ; underside with 5 yellow bands. Tibiae 

 towards the base and tarsi tawny ; fore tarsi dark tawny. 



Rare. In Mr. Saunders's collection. (E.) 



