19 



Genitalia: uncus with minute, almost vestigial, dorsal spine near tip, but 

 with the tip semi-cylindrical, not spoon-shaped; vinculum tapering to a blunt 

 point; heavy spine patch on penis; valves with sacculus at base, as shown in 

 the figure, formed apparently by the way the valves are folded at the base, 

 not a more heavily chitenized structure unaltering the width of the basal portion 

 as in Grotellaforma colora. 



Notes: four specimens only in the Barnes Collection, all from Deming, 

 N. Mex. 



Type: "Type 9" (Holotype), Deming, N. Mex., Sept. 1-7. 



Grotella olivacea, B. & McD. (fig. 12). 



1911, B. & McD., Jour. N. Y. Ent. Soc, XIX, 152, Grotella. 1912, B. & 

 McD., Cont. Nat. Hist. Lep. N. A., 1, # 4, 11, pi. IV, f. 8, ("Type $"), Grotella. 



Front essentially as in septempunctata, but the main process is projected 

 somewhat further, is more cup-shaped; and the smaller central process exceeds 

 the palpi. In consequence, the palpi are somewhat "folded". Fore tibia with a 

 very heavy inner claw, and outer claw-like spine ; but apparently lacking the two 

 small spines on the inner side. Mid tibia spined. Hind tibia unspined (?). 



Head, collar, thorax, abdomen and ground color of the primaries concolor- 

 ous ; variable in intensity, but always some shade of olive-brown. The primaries 

 crossed by t. a. and t. p. lines of darker brown, variably distinct, the former 

 straight below costa, obliqued strongly outward below cell, thence obliqued in- 

 wardly to the inner margin. T. p. line outcurved and dentate around end of 

 cell, thence with a single incurve to the inner margin. Reniform present, usually 

 distinct, as a pale dot or bar at the end of the cell. S. t. shade usually vague. 

 Fringe: brownish, interlined with darker brown. Secondaries: fuscous-brown. 

 Fringe paler, interlined with darker. Beneath : primaries with the ground color 

 nearly as on the upper side, slightly paler apically. Secondaries : cream-color. 



Habitus: greatly resembling a small Narthecophora pulverea; and is the 

 only species of Grotella known to the authors, possessing such a habitus. 



Expanse: 18-21 mm. 



Genitalia: uncus with tip slightly spoon-shaped and with dorsal spine; 

 vinculum tapering, but the point is much blunter than typical in the genus ; penis 

 with a large number of spines, but the ones near the basal end appear some- 

 what longer and heavier than in septempunctata, the total number of spines 

 less but the bulk of the spination about the same due to the heavier spines. 



This species is represented in the Barnes Collection from: "N. 

 Max.", Aug.; Santa Catalina Mts., Pinal Co., Ariz., Aug. 1-7, Sept.; 

 So. N. Mex., Aug. 23-30, (Poling); Deming, N. Max., March 16-23, 

 Sept. 1-7. 



Type locality: Deming, N. Mex., Sept. 1-7. 



Number and sexes of types: "Type $", the specimen figured in the "Con- 

 tributions", hereby designated the Lectotype; "Type 9", (Allotype) ; and 2 9's, 

 "Cotype(s)", (Paratypes). 



