A REVISION OF THE DELTOID MOTHS — S.>HrH. 29 



,111(1 only speciuien ever seen by me is iiiipeifectly set and is niisleadino- 

 in the ini[)ression it gives of the wing form and general liiibitus. This 

 does not seem to differ in the least from Z((nclo<jn<(t}ui, wiiih' no strue- 

 tural character is ai)parent to me on (dose examination. 



Pityolita has slightly more determinate apices of the primaries, 

 enhanced by a somewhat narrower base, making them a little more 

 evenly trigonate than in the normal type; but, unfortunately-, this differ 

 eiice is inconstant and becomes greatly lessened in some large females, 

 making it thus an unsafe basis of division. The siiecies fits very neatly 

 among the typical siiecies of the genus. 



The species formerly referred to Meguchyta forma fairly well-marked 

 division of the genus, re(;ognizable by the costal eiilargeiiieiit of the 

 ordinary spots which, even when least marked, is in (piite strong con 

 trast to the even threadlike lines of all the other species save Z. mini- 

 maliSj which somewhat resembles Z. incons2)icnalis in this i)articular, 

 but is much larger and, in other respects, quite well separated. 



Z. lituralifi is at once separable from all other species by a series of 

 three distinct brown costal spots, of which the outer is apical and fol- 

 lows the subtermiual line. It is also the largest of this series and in 

 all respects the best marked as well as the most common. 



Z. theralifi. Walker, or Z. (lecepfricaUs, Grote, is a decidedly smaller 

 gray species, in which the costal spots on the median lines are black 

 and (piite well marked; but the third spot is much less defined, is not 

 apical, and precedes the subtermiual line, continuing for a greater or 

 less distance to emphasize this line, and often no more marked on the 

 costa than on the hind margin. In this si)ecies the transverse posterior 

 line makes a very abrupt outward bend below the costal spot, and the 

 line runs in close proximity to the subterminal line for the balance of 

 its course. 



Z. ))iiiioralis is also gray, but yet smaller than the preceding, from 

 v.hicli it also (litters by the broad, somewhat diftuse median lines, which 

 are scarcely enlarged on the costa, the transverse posterior regularly 

 outcurved, and by the absence of any dark shade to the subtermiual 

 line. 



Z. i)icon.s2)ici(alis is scarcely larger than the preceding, with much 

 the same markings; but it is dull, smoky brown in color, and the 

 median lines are narrow, scarcely enlarged on the costa. 



It is possible that there may be a closer relation between the last- 

 mentioned two species than seems probable at present. I have only 

 two males of Z. iiiixorali.s. and but three females of Z. i)icinisj>iri(((lis; 

 tlie latter not showing any appreciable variation; but the markings 

 are apparently identical, and the strong diff'erence in ground color with 

 the relative distinctness of the median lines may possibly come within 

 the range of variation in this series. 



Of all the other species referable to this genus, none except Z. niini- 

 nialis shows auv trace of aiiv costal enlaruement of the median lines, 



