No. 34-] HEMIPTERA OF CONNECTICUT: APHIDIDAE. 301 



ally it with the INIacrosiphini and a distal filament so short that it 

 would render it somewhat conspicuous even among the Aphidini. 

 It is frequently included under Siphocoryne or Rhopalosiphiim. 



Siphocoryne Passerini. 



S. capreae (Fabricius). Aphis capreae Fabricius. (Fig. 31, 3.) 



Syst. Ent, 734, 1775. 



Like the foregoing species this inhabits Salix and various genera 

 of the Umbelliferae. It is figured by Gillette (1911a) and by 

 Theobald (1912). 



The approved generic name for the three foregoing species has 

 more recently been Hyadaphis. The erection in 1914 of the genus 

 Cavariella appropriated pastinaceae, however, and logically adopted 

 the second species with a caudal horn — capreae. 

 S. pastinaceae (Linnaeus). Aphis pastinaceae Linnaeus. 



Syst. Nat, Edn. 10, 451, 1758. 



This species inhabits Salix and various genera of the Umbel- 

 Hferae. It is figured by Theobald (1912). 



S. xylostei (Schrank). Aphis xylostei Schrank. "Rhopalosi- 

 phum pastinaceae Linnaeus" Gillette (1911a). (Fig. 28, 12; 

 Fig. 31, 12.) 



Fauna Boica., ii, 107, 1801. 



This aphid is found on Symphorocarpus and Lonicera in the 

 spring and migrates to parsnip and other umbelliferous plants for 

 the summer. 



Hartford, 18 July, 1913 (A. B. Pimm) ; on Symphorocarpus, New Haven, 

 13 Oct., 1909 (A. I. B.) ; on Tartarian honeysuckle. New Haven, 4 June, 

 1909 (W. E. B.) ; on parsnip, New Haven, 13 July, 1909 (A. I. B.). 



Macrosiphini. 



Amphorophora Buckton. 



This genus as here used functions conveniently for those species 

 which cannot go into Rhopalosiphiim (as long as that genus holds 

 prunifoliae (avenae)) on the one hand or into Nectarosiphon on 

 the other. Its stability is not warranted but there is some 

 precedence for this usage. 



Key to Species. 



1. Antennal sensoria of iii numerous 2 



Antennal sensoria of iii in single row rhois 



2. Antennal segment iii shorter than iv -[- v lactucae 



Antennal segment iii longer than iv -j- v nabali 



A. lactucae (Kaltenbach). Aphis lactucae Kaltenbach. 



Mon, der Pflanz., 37, 1843. 



There is a difference of opinion as to whether Aphis rihis 

 Linnaeus is this species or the species indicated as Myzus rihis 



