162 WESTERN QUARTERLY REPORTER. 



ALLANTUS Jurine. 



1. A. ventralis. — Black ; feet before and abdomen beneath 

 white. 



Inhabits Arkansa. [72] 



Body black ; nasus, labrum, mouth, abbreviated line above the 

 eye and large spot beneath it, white ; thorax with a line before 

 the wing, small spot each side on the scutel, white ; wings a little 

 dusky : feet white before ; pectus with a white line on each side, 

 and somewhat testaceous central spot ; tergum immaculate j venter 

 white. 



Length nine-twentieths of an inch. 



2. A. bifasciatus. — Black ; tergum with a white band at 

 base, and a rufous one in the middle. 



Inhabits Arkansa. 



Body black ; nasus white ; labrum and palpi dull whitish : 

 thorax with a yellowish line before each wing ; scutel yellowish ; 

 wings dusky ; nervures brown ; feet white ; tips of the posterior 

 thighs and their tibiae, black ; tergum with a white band at base 

 and a rufous one on the middle. 



Length seven-twentieths of an inch. ( $ ) 



For this handsome species I am indebted to Mr. Thomas 

 Nuttall. 



3. A. externus. — Black : tibia white on the exterior side. 

 Inhabits Missouri. 



Body deep black ; head with a spot each side on the nasus and 

 base of the mandibles, white ; wings fuliginous ; nervures black : 

 thighs at tip above, incisures of the coxae, exterior side of the 

 tibia and tarsi, white : posterior feet robust. 



Length nine-twentieths of an inch. A female. 



4. A. pallipes. — Black ; thorax rufous before ; feet white. 

 Inhabits Missouri. 



Body black ; labrum and palpi white ; thorax with a rufoue 

 triangle before, a rufous spot on each side of the disk, another 

 beneath the origin of the wing and tip of the scutel rufous : a 

 whitish spot before the wings ; wings, a little dusky ; carpus 

 whitish : feet white ; posterior thighs blackish in the middle ; ter- 



