BY ARTHUR WHITE. 79 



South Wales. The three species are distinguished as shown 

 in the following table: — 



Tahle (if the. Ausfrafiaii S pedes ^of Stenopogon^ 



1. Bristles of tibiae entirely or principalh^ black; 



large species. JiiLoxGATUs, Macq. 



Bristles of legs pale yellow ; smaller species 2 



2. All femora black; veins of wing black. 



JSlCOTELES, Walk. 

 Anterior femora with basal two-thirds black, 

 apical third reddish-yellow; middle femora en- 

 tirely reddish-yellow; jxjsterior femora black. 

 Wings yellow, with foreborder and anterior 

 veins bright yellow. Flavipennis, .S'^;. nov. 



Note. The characters given in the above table easily 

 distinguish S. f/aitpeiinis from S. nicoieles, and from the 

 ordinai-y varieties of .S' efniu/afus. In Tasmania, however, 

 a scarce variety of S. elonyatux occurs, in which the bristles 

 of the legs are yellow; from this variety .S'. flavipennis Is 

 distinguished by the yellow instead of hyaline wings, by 

 the reddish-yellow instead of black middle femora, and 

 by the smaller size. It may be mentioned that both S. 

 eJi.mjatux and >S'. flavipennis^ occur commonly in New South 

 Wales, without showing any intermediate variations. 



StENOPOCON flavipennis, Sp. Hijl'. 



Face and moustache yellowish-white ; front black ; 

 thorax black, with white tomentum at sides; abdomen 

 black with white side-stripes; anterior femora with basal 

 two-thirds black, apical third reddish-yellow ; middle femora 

 entirely reddish-yelloAv ; posterior femora black; all tibire 

 reddish-yellow, with extreme base black ; tarsi black ; 

 bristles of tibise reddish yellow ; wings yellow, the fore- 

 border bright yellow; halteres light yellow. 



Lenf/fli. Female, 11 mm. 



I/ah. Sydney, N.S.W. 



Female. Face ?nd moustache yellowish white. Front 

 black, with long black hairs. Antennse black. Thorax 

 black, with white tomentum at sides ; thoracic pubescence 

 black ; thoracic bristles white ; scutellum black. Abdomen 

 black, shining, with indistinct white side-stripes, and 

 spare white pubescence. Legs with anterior femora hav- 

 ing basal two-thirds black, apical third reddish-yellow; 

 middle femora entirely reddish-yellow ; posterior femora 

 entirely black ; all tibiae reddish-yellow, with extreme base 

 black ; tarsi black ; all femora with long, dense, white 

 pubescence; anterior and middle femora without bristles; 



