310 Maine Agricultural Experiment Station. 1917. 



was at first suspected that they had worked into mines made 

 by something else and that their presence was accidental. That 

 such was not the case was testified by the larvae themselves 

 when a cut tuber was placed under the microscope. The ex- 

 posed miners w^ere busily tunneling down into healthy tissue. 

 As they worked they moved the ventral flap under the head up 

 against the mouthparts. Some of the trails lay under the skin 

 near the surface of the potato and were apparent as soon as 

 the tuber was w^ashed. Others extended for some distance into 

 the vegetable. 



The larvae were three-sixteenths of an inch in length. They 

 were abundant in the trails, where frequently as many as fifteen 

 or twenty could be found together in the wider places, though 

 the narrow mines seemed to be the work of single individuals. 



A specific determination was not possible on the data pre- 

 sented, but Dr. O. A. Johannsen kindly examined the larvae and 

 pronounced them "probably Camptocladius sp." 



No similar occurrence has come to the attention of the 

 writer since this record for 191 3 and it is hoped that the attack 

 was due to some peculiar local condition which may not again 

 prove favorable to this midge in its career as a serious pest of 

 potatoes. 



EASTERN APHIDS, NEW OR LITTLE KNOWN, 

 PART L* 



The present paper resulted from the examination of the 

 collection of Connecticut aphids lent by Dr. W. E. Britton. Sev- 

 eral undescribed species w&re found, some of which were well 

 known in certain collections without having made their way into 

 literature. A few of these are briefly described by the writer 

 of Part I, and the others are presented by Mr. Baker in Part II 

 as he was already at work on the groups those species represent, 

 and kindly undertook their examination. 



Most of the species are described with reference to mater- 

 ial from Connecticut, though a few not yet reported from that 

 state are included. 



*This is an abstract of a paper with the same title, by Edith M. 

 Patch, published in Journal of Economic Entomology, Vol. 10, pp. 416- 



420. 



