No. 34-1 HEMIPTERA OF CONNECTICUT: APHIDIDAE. 307 



M. asclepiadifolii (Thomas). Siphonophora asclepiadifoln 

 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 WiUiams. 



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 Walker. 



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 WilHams. 



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.). 



