W. M. Davidson

46 public-domain plates in the archive

• Rhopalosiphum arbuti
• Amphorophora latysiphon 29 Jan 1912
• Amphorophora latysiphon 1 Mar 1912 to 31 Mar 1912
• Hyadaphis umbellulariae 29 Jan 1912
• Myzocallis californicus pallidus 5 Jan 1918
• Amphorophora davidsoni 29 Jan 1912
• Myzocallis californicus 18 Jun 1915
• Aphis neomexicana var. pacifica 18 Jun 1915
• Amphorophora latysiphon 29 Jan 1912
• Rhopalosiphum corylina 19 Aug 1915 to 28 Aug 1915
• Lachnus occidentalis
• Vacuna californica 19 Aug 1915 to 28 Aug 1915
• Rhopalosiphum arbuti
• Myzocallis alhambra 5 Nov 1919
• Eriosoma pyricola 19 Aug 1915 to 28 Aug 1915
• Euceraphis gillettei 29 Jan 1912
• Pemphigus ranunculus
• Euceraphis flavus 29 Jan 1912
• Myzocallis pasaniae 12 Jun 1914
• Eriosoma pyricola 19 Aug 1915 to 28 Aug 1915
• Rhopalosiphum arbuti
• Myzocallis californicus pallidus 5 Jan 1918
• Rhopalosiphum corylina 19 Aug 1915 to 28 Aug 1915
• Myzocallis pasaniae 12 Jun 1914
• Amphorophora davidsoni 29 Jan 1912
• Myzocallis alhambra 5 Nov 1919
• Euceraphis gillettei 29 Jan 1912
• Amphorophora latysiphon 29 Jan 1912
• Amphorophora davidsoni 29 Jan 1912
• Hyadaphis umbellulariae 29 Jan 1912
• Vacuna californica 19 Aug 1915 to 28 Aug 1915
• Eriosoma pyricola 19 Aug 1915 to 28 Aug 1915
• Lachnus occidentalis
• Myzus ribifolii 26 Mar 1915
• Eriosoma pyricola 19 Aug 1915 to 28 Aug 1915
• Euceraphis flavus 29 Jan 1912
• Eriosoma pyricola 19 Aug 1915 to 28 Aug 1915
• Aphis neomexicana var. pacifica 18 Jun 1915
• Amphorophora latysiphon 1 Mar 1912 to 31 Mar 1912
• Kakimia muesebecki 12 Apr 1916
• Lachnus occidentalis
• Myzocallis californicus 18 Jun 1915
• Pemphigus ranunculus
• Myzus varians 29 Jan 1912
• Rhopalosiphum corylina 19 Aug 1915 to 28 Aug 1915
• Eriosoma pyricola 19 Aug 1915 to 28 Aug 1915