364 APPENDIX. 



Hcadhlack ', hypostoma and base of the antenna yellow ; 

 thorax with two oblique, fuscous lines confluent at the 

 middle of the base ; and a dilated fuscous line each side 

 much abbreviated before and hardly reaching the basal 

 edge; wings slightly tinged with dusky, immaculate; 

 poisers white ; feet white, dusky towards the tip ; tergum, 

 segments with blackish posterior margins ; last segments 

 entirely blackish ; anal segment yellow. 



Length 'B nearly one-fifth of an inch. 



The wing nervures are arranged altogether like those of 

 AsiNDULUM punctatum, Latr. Closely allied to S. fasci- 

 ata, nobis, but may be distinguished by the narrow, oblique 

 lines of the thoracic disk. 



LEIA, Meig. 



L. ventralis. Deep black, polished j wings fasciate near 

 the tip ; feet yellowish. 



Inhabits North-west Territory. 



Head a little hairy ; palpi and three basal joints of the 

 antennae, yellowish; remainingjointsof the latter fuscous; 

 thorax with sparse hairs ; a whitish humeral spot ; wings 

 hyaline, with a dusky band near the tip, which does not 

 reach the thinner margin, and a dusky tinge or line be- 

 tween the ultimate and penultimate nervures ; poisers with 

 a fuscous capitulum and yellowish stipes ; feet yellowish- 

 white ; tarsi dusky ; tergum hairy ; venter pale yellowish. 



'5 Length of the body nearly three-twentieths of an inch, 

 to tip of the wings more than one-fifth of an inch. 



This species is closely allied to the bimaculata, Meig. 

 with which it also corresponds in the position of the stem- 

 mata and the arrangement of the wing nervures, even to 

 the dislocation of the superior branch of the inferior fur- 

 cate nervure. 



