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THE CANADIAN ENTOMOLOGIST, "7 



DESCRIPTION OF THE STRUCTURAL CHARACTERS OF 



THE LARVA OF SIBINE FUSCA, WITH NOTES ON 



THE FOUR KNOWN LARV^ OF SIBINE. 



BY HARRISON G. DYAR, NE\V YORK. 



Stoll figures the moth of two species of Sibine. He also figures two 

 larvae of Sibine, but, owing to the unfortunate confusion into which his 

 labels must have fallen, they are not attributed to the right imagines, but 

 to two species of Dioptidt^. After Stoll, Sepp also illustrated two species 

 of Sibine, with their larvae correctly shown. One of Sepp's species is the 

 same as one of StoU's, the other is different in both larva and moth. 

 This gives three species of the genus known in both larval and mature 

 states, assuming only that the larva which Stoll figures as micilia (228 G.) 

 really belongs to the moth nesea* , which I think is probably the case. 



The names of the species are Jiesea, Stoll ; fiisca^ Stoll ( ^^trhnacula, 

 'SiQ}^^ = bonaerejisis, Berg. =? megasomoii/es, W ■d]ker = ? a^u is, Moeschler), 

 and vidua, Sepp ( = ?/umosa, Walk.). As a fourth species we have 

 stimulea, Clemens ( = ephippiatiis, Harr.). 



The larvae have in common the following characters : (i) The 

 shape of the body, which may be sufficiently described by a reference to 

 the well-known S. stimulea; (2) the absence of subdorsal horns which 

 bear stinging spines on joints 6 to 10 ; (3) the presence of a large patch 

 of detachable spines above the horn on joint 13 and the lateral horn ot 

 joint 12 ; (4) probably the presence of skin spinules only without 

 granules, though this can not be definitely asserted till the two species 

 nesea and vidua have been microscopically examined ; (5) the color- 

 ation involves a square green patch on the middle of the back, variously 

 modified. Other characters are shared by the whole group of spined 



Eucleids. 



Synopsis of the Larv^. 



The subdorsal horns which are present, long. 



Lateral horns long ; green, the horns all purple-brown, dorsal mark 



square, dark green, broadly edged with yellow vidua. 



Lateral horns short. 



. Subdorsal horns and body green ; dorsal mark square, without a 



central dark patch, edged before and behind with yellow .... nesea. 



Subdorsal horns and body purple-brown ; dorsal mark elongate, 



projected below the posterior subdorsal horns, and bearing a 



central, elliptical purple-brown patch edged with vrh'xiQ. .sti/nulea. 



* Stoll's so-called larva of iicsea is an absurd error. It is a Notodontian with a 

 long yellow horn on joint 6. 



