132 THE CANADIAN ENTOMOLOGIST. 



as anthers are to be had, the larvae live on them, but as the flowers 

 mature and fall off, they are forced to eat through and into the hard seed 

 vessel, and I have even seen them boring into the woody stem below. 

 These were belated larvae, and such as when mature produce the variety 

 negleda. The larvae being starved are small, and the resulting butterfly is 

 small. Negleda is flying now, and many examples are very diminutive. 

 The color of the larvae feeding on Dogwood varies much from the color 

 of those which feed on Cimicifuga racemosa, few being white in the last 

 stages, but nearly all dull crimson or green, or a mixture of the two. 

 Nevertheless a small percentage of the larvae on Cimicifuga are also 

 green or crimson, though most are white. I have not seen ants 

 about the Dogwood, and on introducing them to larvae confined in 

 glasses, they manifested no knowledge of the larvae, and were wholly indif- 

 ferent to them. And only on rare occasions have I been able to discover 

 the tubes on nth segment protruded even partially with any of the Dog- 

 wood caterpillars kept in the house. When I did see them, they pulsated 

 incessantly, out and in at least once a second. In two instances, after 

 repeated examinations, I chanced to see the tubes fully expanded, 

 but accompanied by this pulsating movement, the withdrawal being 

 more or less complete. No teasing or irritating at any time availed 

 to make them appear, but severe pressure, resulting in the death of the 

 larva, applied to the sides of the i ith segment, did produce them. But even 

 by this pressure I could not discover the organ of nth segment, nor force 

 any fluid from it. As with the fall food-plant, Actinomeris squarrosa, the 

 Dogwood is neither sweet nor juicy, and it may be that the larvae feeding on 

 these plants do not secrete the fluid. Prof. Comstock found it different 

 with the Viburnum, and stated that the " tubes on the penultimate seg- 

 ment were seen to evaginate repeatedly at the solicitations of the ants." 



From Cimicifuga I have collected many eggs and scores of larvae, and 

 day after day I have watched the latter on the stems of the plant. So 

 long as the larvae were small no ants were seen attending, but they have 

 been constantly found with nearly mature larvae. The ants have been 

 of four species, the first scarcely more than h inch long, the second h 

 inch, the third iW. inch, and the fourth r„ inch, but the specific names 1 

 have not yet ascertained. Most often it has been the second of these 

 which attended the larvae, and from two to eight in company, on the same 

 stem, with from one to three or four larvae. The third species is fre- 

 quently seen, but only from one to three have been seen on the stem. Of 



