No. 34.] HEMIPTERA OF CONNECTICUT: APHIDIDAE. 307 



M. asclepiadifolii (Thomas). Siphonophora asclepiadifolii 

 Thomas. 

 Rept. Ins. 111., 8, 58, 1879. 



M. calif ornicum (Clark). Nectarophora calif ornica Clarke. 

 M. laevigatae Essig. 



Can. Ent, xxxv, 254, 1903. 



This willow aphid is described and figured by Essig (1911b) 

 and Patch (1913a). 



M. carpinicolens Patch. 



Me. Agr. Expt. Sta., Bull. 282, 209, 1919. 

 M. cnici (Schrank). Aphis cnici Schrank. Aphis cnici Williams. 



Fauna Boica, ii, 122, 1801. 



For discussion and figures see Davis (1911a). 

 M. coryli Davis. 



Can. Ent, xlvi, 48, 1914. 

 M. crataegi (Monell). Siphonophora crataegi Monell 



Bull. U. S. Geol. Geog. Surv. Terr., v, 20, 1879. 



For description and figures see Patch (1914b). 



On Crataegus Crus-galli, New Haven, 8 Sept., 1910 (W. E. B.) 

 M. diervillae Patch. 



Me. Agr. Expt. Sta., Bull. 282, 210, 1919. 

 M. dirhodum (Walker). Aphis dirhodum W'alker. 



Ann. Mag. Nat. Hist., iii, 43, 1849. 



This species migrates between rose and grains. For figures see 

 Patch (1914b). 



M. erigeronensis (Thomas). Siphonophora erigeronensis 

 Thomas. 



111. St. Lab. Nat. Hist, Bull. 2, 7, 1877. 



For figures see Gillette (1911b). 

 M. eupatoricolens Patch. 



Me. Agr. Expt. Sta., Bull. 282, 214, 1919. 

 M. eupatorii (Williams). Siphonophora eupatorii Williams. 



Aphid, Nebr, 77, 191 1. 

 M. gaurae (Williams). Siphonophora gaurae Williams. Siphono- 

 phora gaurina Williams. (Fig. 30, 7 and 8.) 



Aphid, Nebr, 79, 191 1. 



For discussion and figures of this species common on Gaura and 

 Oenothera see Davis (1911a). 

 M. granarium (Kirby). Aphis granaria Kirby. 



Trans. Linn. Soc. Lond, iv, 238, 1798. 



For description and figures see Theobald (1913a). 



On winter wheat, Meriden, 26 May, 1909 (B. H. W.) ; on rye, Meriden, 

 26 May, 1909 (B. H. W.). 



