August, '17] , PATCH: EASTERN APHIDS, PART I 417 



attacks cyme, both during flower time and early fruiting, ventral leaves 

 and the tender twigs. The insects are gregarious and their colonies 

 are frequently wellnigh exterminated by hymenopterous parasites. 

 It is sometimes present on the same Viburnums with Aphis viburnicola 

 Gillette, A. rumicis Linn, and Macrosiphum viticola Thomas, but there 

 is no need of confusing it with anj' of these species. 



On August 24, 1912, and August 26, 1915, at Orono oviparous 

 females were found to be numerous feeding at berry clusters and 

 depositing eggs thickly in axil of leaf and between terminal stems. 

 INIales have not yet been recorded. The time of the hatching of the 

 stem female has not been observed. 



The writer has seen specimens from Vibur7ium acerifoliuni L., 

 Maine and Marjdand; V. cassinoides L., Maine; V. dentatum L., 

 Maine and Virginia; V. opulus L., Maine and Connecticut; V. plicatum, 

 Connecticut; V. puhescens Pursh, Maryland. 



Aphis rumexicolens n. sp. 

 (Fig. 20, f, g) 



Alate Vivipara: Antenna 6-jointed, on no frontal tubercle, III with about 14 

 sensoria irregularly placed along whole length, V shorter than IV, VI longer than III; 

 beak short, not or scarcely reaching second coxa; venation rather heavy but not 

 shadowed; abdomen -with black dorsum and large black lateral spots, cornicle shorter 

 than tarsus or cauda, slightly bulging; cauda broad and blunt, about the length of 

 tarsus but up-turned and appearing shorter, with a pair of dorsal tubercles near base. 



Apterous Vivipara: Antenna 6-jointed, III without sensoria, base of VI subequal 

 to V; beak short not reaching second coxa: abdomen not showing in alcoholic mount 

 the black maculations of the alate form, cornicle shorter than tarsus, not longer than 

 base of VI, thick at base and abruptly narrowing, tip with flare. 



The cotype locality is Wallingford, Connecticut, where a collection 

 of apterous and alate vivipara and pupal nymphs was made June 9, 

 1913, from Rumex acetosella L., by Dr. W. E. Britton. 



It is needless to say that this is no typical Aphis, but it does not seem 

 to slip into any of the several genera newly erected from Aphis and the 

 writer hesitates to contribute to the modern tendency of establishing 

 new genera on specific characters, — a conservatism which has dis- 

 advantages of its own, it must be confessed. 



Aphis saliceti Kaltenbach 

 (Fig. 20, a, b) 



This insect has not previously been recorded for America. It was 

 collected at Orono durmg late June and July, being abundant upon 

 fennel {Foeniculum vidgare), July 25 upon Heradeum lanatuvi, and 

 August 12 upon cultivated parsnip in 1913. The same year it was 

 taken on cultivated parsnip July 25 at Machias, Maine, and on willow 



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