POPLAK INSECTS. ' 181 



B. OTHER IMPORTANT POPLAR INSECTS. 



HEMIPTERA. 

 Apliididse. 



Pemphigus bursarius Linnaeus; Europe; foliage. 



Pemphigus immunis and P. napoeus; India; attacks the twigs of Populus euphratica and P. tremula. 



Pemphigus filaginis Fonsc. (viarsupialis Koch); Europe; forms pocket-shaped galls on the raidrib of 



leaves of poplar. 

 Pemphigus vesicalis Koch; Europe; foliage of Populus alba. 

 Asiphumtremulx De Gear; Europe; attacks young shoots, leaves and petioles of aspen (Populus 



tremula). 



Coccidae. 



Armored— 



Chionaspis salicis Linnaeus; Europe; Populus bahamifcra, P. monilifera, P. nigra, P. tremula. 



Crypthemichionaspis africana Newstead; Egypt. 

 Unarmored— 



Ceroplastes rusci Linnaeus; Italy. 



Pulvinaria bctulse Linnseus; Europe; Populus alba, P. nigra, P. tremula. 



Lccanium coryli Linnaeus; Europe; Populus alba, P. tremula, P. virginiana. 



Lccanium ciliatum Douglas; Europe; Populus alba, P. tremula. 



COLEOPTERA. 

 Anobiidse. 



Ptilinu.'i fuscus Geoffroy; Europe; bores in dead wood of standing living trees. 



Biiprestidse. 



■^ifiAgrilus viridis Linnaeus (see Oak) and A. sexguttatus Brahm.; Europe, bore in bark and branches of 

 poplars and aspens. 

 Capnodis miUaris Klug; India; bores in Populus euphratica. 

 Pcecilonota variolosa Paykull; Europe; bores in bark of poplar and aspen. 

 Mclanophila picta Pallas; South Europe, Algeria; bores in wood of young poplars. 



Scarabaeidae. 



Amphimalion solstitialis Linnaeus; Europe; larvae attack roots of small plants. 



Melolontha hippocastani Fabricius and M. melolontha Linnaeus; Europe; larvae attack roots of seedlings. 



Cerambycidae. 



^■Eolesthes sarta Solsky; India; bores in fopulus alba and P. euphratica. (See pi. XXXV.) 



Lamia tertor Linnaeus; Europe; bores in bark and larger cuttings of poplar and aspen. 



Saperda carcharias Linnaeus, S. scalaris Linnaeus and ^ S. populnea, Linnaeus; Europe; bore in branches 



and trunk. The latter occurs on our Pacific Coast. (See text fig. 86.) 

 Xylotrcchus rusticus Linnaeus; Russia; bores in bark and sapwood. 

 Purpuriiscenus wachanrui Levrat; Baluchistan; bores in Populus ciliata. 



Chrysoinelidae. 



if Phyllodecta vitellinx Linnaeus: Europe, America; leaf beetle. (See Willow.) 

 Crepidodcra aurata Marsham; Europe; leaf beetle on Populus laurifolia and P. alba. (Pee Willow.) 



Curculionidae. 



Orchestes salicis Linna3us; Europe; mines the leaves. 



Orchestes populi Fabricius; Europe; mines the leaves of Populus nigra and P. dilatata. 

 -Jf Cryptorhynchus lapathi Limiaeus; Europe, Eastern United States; breeds in the stems and twigs. 



Ipldae. 



Xylcborus cryptophagus Ratzeburg; Germany; ambrosia beetle of poplar and aspen. 



LEPIDOPTERA. 

 Cossidae. 



Cossus cossus Linnaeus, goat moth; Europe; bores in wood. (See Willow.) 

 ^Zeuzera pyrina Linnaeus; Europe; bores in wood. (See Horse-chestnut.) 



Geometridae. 



Hibernia aurantiaria Esp., H. dcfoliaria Linnaeus and H. marginaria Borckh.; Euroi)e: defoliators. 



Lasiocampidae. 



Eriogaster lanestris Linnaeus, and Malacosoma neustria Lmnaeus; Europe; defoliators. 



Lymantriidae. 



:+; Euproctis chrysorrhcea Linnaeus, -^Lymantria monacha Linnaeus, ^Porthetria dispah Linnaeus Porthcsia 

 similis Fuessly, Stilpnotia salicis Limiaeus; Europe; defoliators. (See Forest defoliators.) 



Sesiidse. 



Sciopteron tabaniformis Rott.; Europe; bores in base of trunk. 



