OF NATLRAI. IIISTUKV. 748 



obscure yellow, longituiliuul spdt each sido at tij» : tir-mu with a 

 perlaceous iriclescencc : on i-:uli sf^^incnt a .slcmlcr yellow [301] 

 band on the posterior suhmargin, a little luidulatcd obtu«ely un 

 its anterior edge, not abruptly eumrginatcd on each side ; on iho 

 anterior submargin of the segments an injprosned tran.svfrso line : 

 pleura, a small yellow spot beneath each wing ; wingn hyaline, a 

 slightly dusky margin at tip : feet, eoxae with a yellow spot: lar»i, 

 excepting their tips : thighs at tip or a line above, and anterior 

 pairs of tibiae yellow : venter five spotted each side. 



Length from three-fifths to seven tenths of an inch. 



This is so much like M. subuldta uob., that it is not without 

 much hesitation that I give it as distinct. It is, however, 

 much larger and more robust, and the form of the bands 

 of the tergum is difl'erent; those of the mhnlitta being abruptly 

 notched each side of the middle as in the vnhulm Fubr., whereaa 

 in the bands of the present species, instead of the abrupt notch, 

 is an obtuse and dilated undulation of the edge. 



A variety occurs in Missouri, of which the wings are yellow- 

 ish, and the second recurrent ncrvure is confluent with the divi- 

 ding nervure of the second and third cubital cellule. 



2. M. SUBUL.\TIJ8 nob. Sap//ij(t, Western Quarterly Reporter. — 

 A variety inhabits Mexico in which the abdominal bands are less 

 abruptly emarginate each side. 



SAPYGA Latr. 



S. CENTRATA. — IJlack, with yellow spots j abdomen ')-banded. 



Inhabits United States. 



Uody black: head : thorax with a transverse spot 



each side before, two on the middle, one beneath the superior 

 wing, and two large ones behind, yellow : [302] wing hyaline ; 

 nervures fuscous : stigma brown : radial cellule fuligint)us : ter- 

 gum, each segment, excepting the first, with a yellow, dilated 

 band on its middle and more or less interrupted : venter with a 

 transverse spot each side on the third, fourth and fifth segments : 

 feet yellow : thighs, except at the tip, black : tarsi honey -yellow. 



Length about three-tenths of an inch. 



Var. y «. Spots ferruginous. 



Length nearly two-fifths of an inch. 

 1835.] 



SfiS 



