INSECTS OP ASH AND ASPARAGUS. 



27 



CurcuUonidse. 



Clonus fraxini De Geer, a small oval weevil; Europe; breeds externally on the leaves of ash and olive 

 pupates in cocoons on the leaf. 



Scolytoidea. 



Hylesinus crenatus Fabricius, a bark beetle; Russia, Germany; bores the bark of ash and oak. 

 Hylesinus fraxini Panzer, a bark beetle; Europe; bores the branches and tops, attacking bark of 



ash, olive, and acacia. 

 Hylesinus olciperda Fabricius, a bark beetle; Europe; attacks ash and olive. 

 PMceotribus caucasictis Reitter; a bark beetle; Russia; attacks young portions of the trees. 

 ■^Scolytochelus multistriatus Marsh., a bark beetle; Europe; attacks bast and sapwood of trees. 

 Scolytus scolytus Fabricius, a bark beetle; Europe; attacks bark, bast, and sapwood. 



LEPIDOPTERA. 

 Cossldse. 



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

 ^Zeuzera pyrina Linnaeus, a wood borer of Europe, Africa, North America. (See Horse-chestnut.) 

 Sesiidae. 



Sesia spheciformis Gmg., a clear-winged moth; Europe; bores in the wood. 

 Tortricidae. 



Tortrix podana Sc, a 

 grass-green larva, 

 which occasionally 

 attacks ash; Europe. 



Hyponomeutidae. 



Prays curtisellus Don., 

 a small moth; Europe; 

 larva mines leaves, 

 skeletonizes, webs 

 leaves, or mines buds, 

 in its different genera- 

 tions. 



Gracillariidse. 



Gracillaria syringella 



Fabricius, a yellowish 



olive-brown moth: 



Europe (Sweden); 



larvae first mine the 



leaves and then roll 



them; attack also 



Syringa. 



HYMENOPTERA. 

 Tenthredinidae. 



Macrophya punctum-album Linnseus, a saw-fly; England; very injurious. 



LITERATURE. 



SoRAUEK, P. Handbuch der Pflanzenkrankheiten, 3d ed., vol. 3, 1913. 

 NCssLiN, Otto. Leitfaden der Forstinsektenkunde 2d ed., 1913. 



ASPARAGUS. 



(Asparagus officinalis Linnseus. Family Liliacese.) 



Various other species of asparagus are cultivated for decorative purposes. The 

 above-mentioned species is useful both for its delicious edible shoots and its graceful 

 foliage. Pests introduced on any type of asparagus are likely to attack the culti- 

 vated crop. 



.4. BETTER KNOWN ASPARAGUS INSECTS LIKELY TO BE IMPORTED. 



Crioceris spp. 

 (Asparagus Leaf Beetles. Chrysomelidae; Coleoptera.) 



Species: ^C. asparagi Linnseus; Europe, introduced into North America and widely 

 distributed; asparagus. (See text fig. 14) A very important pest. >f<C. 12-punc- 

 tata Linnjeus; Europe, introduced into North America and widely distributed; aspara- 



FiG. 14.— Asparagus beetle (Crioceris asparagi): a, Adult; 6, egg: 

 young larva; d, full grown larva; e, pupa. (Chittenden.) 



