RILEY — NOTES ON THE YUCCA BORER. 



333 



middle and hind) with brushy hairs beneath the femora; the tarsi all 

 studded beneath with minute reddish spines, the hind and middle tibiae 

 still more strongly spined, and each with a pair of more prominent spine- 

 like, apical spurs, of equal size, and hardly longer than the other spines 

 in c? and not longer than the diameter of tibiae in $ : the front tibiae un- 

 armed, the nodule on the inner apical third ovoid and dark : tarsal claws 

 with a very small pulvillus between them: front femora 5.5 mm. long; 

 tibiie rather more than half as long; tarsi as long as femora : middle 

 femora 7.4 mm. long; tibire and tarsi but slightly shorter: hind femora 

 same length as front ones; tibiae ^ longer. Wings, with the scales, small 



[Fig. 30-] 



Megathymus: a. b. venation of frort and 

 hind wings; c, labial palpus, denuded; d. club 

 of antenna; e.f.g, front, middle and hind legs. 



but mostly long, narrow and 

 dense, with long hair at base 

 superiorly and with the general 

 shape and venation (Fig. 30. a, 

 b) of Ilfsperia, the primaries 

 with the apical angle more acute, 

 but less so than in 7/iymele; anal 

 angk- not produced but rounded : 

 secondaries narrow and more 

 rounded than in any other Hes- 

 perid genus known to me : veins 

 quite stout. Abdomen i, very 

 stout and heavy, thickening be- 

 hind, blunt at tip, and truncate 

 below; c? more slender and gra- 

 dually tapering. Specific Char- 

 acters — Average expanse 2.50 

 inches ; length of body 1. 12 inch- 

 es. General color, above, deep 

 umber -brown, the body more 

 grayish, especially the tegulae; 

 the longer hairs of mesothorax 

 and base of abdomen inclining 

 to ferruginous : whitish in front 

 and around the neck and back 

 of the eyes. Primaries with a 

 notched ferruginous band on the 

 a narrower mark running from 



outer fourth bounded by veins i and 4; 

 the posterior margin of this between 4 and 6; a paler mark in a line with 

 the first band between 6 and 9, and a ferruginous mark again just within 

 the discal area — the veins traversing these spots showing distinctly black: 

 an apical shade, a costal streak between veins 8 and 9, and alternate marks 

 on the fringes, are pale yellowish ; while the basal hairs are ferruginous. 

 Secondaries with a ferruginous border and straw-yellow fringes. In the 

 ^ the antennal stem is paler, the spots on primaries smaller and paler, 

 and the border on secondaries wider; while in the $ the secondaries have 



