326 



PSYCHE. 



[ Miuxh — April 1S90. 



differ from those of the thoracic seg- 

 ments in having a somewhat verticillate 

 arrangement of the large five or six ter- 

 minal spinules, all being pale except the 

 terminal one, which is considerably 

 larger than the others. 



The single median spines on the 8th 

 and 9th abdominal segments respec- 

 tively, occupy the same position as in 

 H. to, but are larger in proportion and 

 are not forked as they are in H. io; on 

 the contrary they resemble spines, one 

 being larger and darker than the others ; 

 the spine on the 9th segment is a little 

 smaller than the one preceding it. 



To recapitulate, it will be seen that 

 the spinulate spines of Pseudohazis 

 eglajitei'ina in stage i are more com- 

 plicated than those of Hyperchiria io 

 of the same stage, so that the bod}^ is 

 more concealed from view. The tho- 

 racic dorsal spines are forked but not so 

 simply as in H. io, while the median 

 single ones on the 8th and 9th abdomi- 

 nal segments are not forked but more 

 or less densely spined in irregular 

 whorls, with one of the spines larger 

 than the others. 



Fully grown la^-va. — The following 

 description was drawn up many years 

 ago from between forty or fiftj- alco- 

 holic specimens from the Gulf of Geor- 

 gia, Cal., in the Museum of comparative 

 zoology. There was no noticeable va- 

 riation in the lot. The larva is inter- 

 mediate in its characters and in size 

 between Hc7ni1cHca maia, which it 

 more nearly approaches, and HypercJii- 

 ria io. The head is smaller than in 



either of the two genera mentioned ; in 

 the thickness of the body it approaches 

 H. io rather than H. maia. The shape 

 of the clypeus is much like that of H. 

 maia. The dorsal spines are whorled 

 as in H. viaia. The lateral subdivided 

 or whorled setiferous spines are longer 

 than those of the two dorsal rows, but 

 are not so long as in H. maia. The 

 arrangement of the longer spines on the 

 thoracic segments, and on the Sth and 

 9th abdominal segments are as in H. 

 7naia, but they are shorter, more bushy 

 and more subdivided. The suranal 

 plate is triangular lunate. The dorsal 

 spines are shorter and sharper than 

 those of H. maia, being very sharp 

 and the prick painful even in alcoholic 

 specimens. 



The head, body and spines are black ; 

 in H. maia the head is reddish, in H. io 

 amber. There is no special coloration 

 to mark the larva of H. eglanterina, 

 the body in alcoholic specimens being 

 uniformly dark. 



Larva of ^.tJi stage. —The larva in 

 this stage scarcely dithers from that in 

 the last stage, the inequality between 

 the length of the dorsal and upper lat- 

 eral spines is observed in this stage. 



Mr. H. Edwards has described (Proc. 

 Cal. acad. sci., 19 April, 1875), the 

 eggs and the mature larva ; he states 

 that it feeds on Fraugiila calif ornica 

 and Rosa. He states that the head is 

 black, and the body entirely dull black. 

 "Each segment is armed with six lateral 

 spines, very finely branched, and two 

 dorsal fascicles of spines, bright chestnut 



