( 3L>0 ) 



fonui'i'ly siild liy iStaudiiigei' as beiiii;' this hylirid, it' tlicy really did ikiI ditl'er from 

 pojiiili as stated by Standfuss and Staiuliiigcr, were doubtless true popidi. The 

 collector from whom tStaudiiiger received these " hybrids "' may have been taken in. 

 The name inversa of Tutt, I.e., refers to these specimens, not to the trne hybrid 

 popiili X occUata. 



The ? popidi x ovcUdtn kindly lent to ns by Standfnss agrees much better 

 with popiili than with ocellata. The eye-spot of occUata is represented by a 

 blackish shade.* The thorn at the end of the foretibia of ocellaUi is here vestigial. 

 The frenulum is reduced but distinct. The most remarkable feature of the sjiecimen is 

 the antennae, which have rather long seriated ciliae, which is not the case in the 

 ? ? of either parent-sj)ecies. Does this mean reversion to a former state of 

 development ? One of our two ? ? ocellata x popidi has similar antennae. 



The hybrid Mimas tiliue x Sphin.v ocelUda is a very interesting product 

 obtained by Professor Standfnss in some numbers. We have seven c?c? of this 

 hybrid. They come in a])pearance nearer the c?-parent than the ? -parent, but only 

 in appearance. In structure they are decidedly nearer occUata. As the structure 

 does not seem to have been closely compared, we give the following results of our 

 investigation : 



1. In ocellata the foretibia ends in a jirominent thorn, which is absent from 



tiliae ; the h^ybrid possesses the thorn, though somewhat stunted. 



2. The tibiae are not spinose in ocellata and densely spinose in tiliae ; there 



are no spines in the hybrid. 



3. The proximal pair of hindtibial spurs is absent from ocellata, and ])resent 



in tiliae ; these spurs, in the hybrid, are absent, or are represented by two 

 small tubercles, or are distinct but shorter than in tiliae. The apical 

 spurs, which are much shorter in ocellata. than in tiliae, are intermediate 

 in the hybrid, both being sometimes of the same length. 



4. The retinaculum and frenulum are normal in tiliae, and vestigial respect- 



ively absent from ocellata. The hybrid agrees with ocellata in the 

 absence of a retinaculum, but has a long, thin, weak frenulum. 



5. Sexual armature (only one specimen dissected) : the tenth tergite of the 



hybrid stands intermediate between those oi ocellata and tilias ; the harpe 



is almost like that of ocellata, differing essentially from that of tiliae ; the 



jienis-sheath has no armature, differing from that of either jtarent-species. 



Hah. Europe as far west and north as Ireland, Scotland, Lapland ; southward 



to Andalnsia and Sicily ; eastward to the Ural, Transcaucasia, and Asia Minor. Not 



found in Greece. 



In the Tring Museum a series of larvae and pu])ae and 40-odd specimens, 

 besides W> S S and 2 ? ? ocellata x popidi, and 1 ? popidi x ocellata. 



h. Sph. ocellata atlanticus. 



Hmeriitlhus umlhihi var., Lucas, Ihdl. Sui\ Eiit. Frtince p. 92 (1856) (Algorie). 



Smerintlius occlliiliix, Boisduval, Sjiec. Gin. Lip. Hit. i. p. 31. n. 20 (1875) (partim ; Alge'rie). 



Smerhilhiis nrellata, Obertliiir, El. d' Eiil. vi. p. 65 (1881) (Oran). 



*Smi'rmlhiin all<inlirii« Austaut, Le Xatiinil. xii. p. 190 (181)0) (Oudja) ; Kirby, Oil. Lep. /let. i. 



p. 711. n. 2 (1892) (Morocco) ; Aust., I.e. xv. p. 72 (1893) (larva) ; Rothscb., Nov. ZooL. i. 



p. 98 (18'.I4) (not distinct) ; Bartel, in Rilhl, Grosisschm. ii. p. 178 (1900) (Algier, iv. ; Nord 



Morocco). 

 *SmerinlhuH atUiiitk-iix var. aentimns Austaut, I.r. xii. p. 191 (1890) ; Bartel, l.r. p. 180 (1900). 



• This sha<le is very conspicuous in the second ? , which is nnw in the Trins Museum. 



