LIST OF INTRODUCED FOREIGN INSECTS. 5 



introduction is montionod. Man_y of the most important introduced 

 insects are omitted because they are now so generally distributed 

 that the importation of a few additional individuals will hare no 

 effect upon the existing economic conditions. 



LIST OF IMPORTANT FOREIGN INSECTS WHICH HAVE BEEN 

 INTRODUCED INTO THE UNITED STATES. 



MITES (ACARINA). 



Orange rust mite or lemon mite. ErinphycK oteivorus Ashmeari. (Sec Citrus.) 



Grape blister mite. Kriophycs vUin Landois. (See Grape.) 



Pear leaf blister mite. Kriophycs pyri Pagenstaecker. (See Pear.) 



Plum blister mites. Eriophycs- phlaeocoptfs Nalepa and E. padi Nalcpa. (See Plum.) 



Potato root mite. Rlnzoglyphvs ( Cvcpophagus) echinopus Fumouze aud Kobin. (See Potato.) 



TIIRIPS (TIIVSANOPTERA). 



Onion thrips. Tltrips tabaci Liiid. 

 •j Pear thrips. Tseniothrips pyri Daniel. 

 Red-banded thrips. Heliothrips- rubrocinclufi (iiard. (See Fruits.) 



SCALES, PUGS, APmDS (IIKMIPTERA). 



v' San Jose scale. Aspidiotus perniciosus Comstock. 

 Apricot scale. Epidiaspis piricola Del Guercio. (See Apricot.) 

 Greedy scale. Aspidiotus camdUx Signoret (rapax Comstock). (See Asparagus.) 

 Pox scales. Aspidiotus ( Chrysomphalus) dictyosptrmi Morgan, Aspidiotus brilannicus Newslcad, and Pin- 



na^pisbuxi Boucho. (See Bo.\.) 

 Catalpa scale. Diaspispentagona TuTgioni. (Sec Catalpa.) 



Citrus scales. Aspidiotus orientalis Newstead and Parlatoria zizyplius Lucas. (See Citrus.) 

 ('oconut palm scale. Aspidiotus ( Chrysomphalus) perscas Comstock. (See Coconut palm.) 

 Fig scales. Conchaspis angrxci Cockerell and Lepidosaphes pcus Signoret. (See Ficus.) 

 Hawthorn scales. Lecanium bitubcrculatum Targioni. (See Hawthorn.) 



Mango scales. Coccus mangifcrx Green am\ Leucaspk indica MaThilt. (t^ce jil. i, fig. L) (See Mango.) 

 Oak scales. Asterolecanium variolosum Ratzeburg. (Sec Oak.) 

 Orchid scales. Aspidiotus ( Targionia) bifurmis Cockerell, Parjatoria protcus Curtis, and P. pseudaspidiotus 



Lindinger. (See Orchid.) 

 Pear scale. Aspidiotus (Diaspidiotiis) oslrcceformis Cnriif^. (Sec Pear.) 

 Rose scale. LeucaspisjaponicaCaekereU. (See Rose.) 

 Sago palm scale. Diaspis zamiae Morgan. (See Sago Palm.) 

 Sugar-cane mealy-bug. Pseudococcus texcnsis Tinsley. (Sec Sugarcane.) 

 Black scale. Saissctia olex Darnard. 

 Fluted scale. Icerya purchasi MwakeU. (See pi. ii. fig: 2.) 

 \/()yster,shell scale. Lepidosaphes ulrtii Liunieus. 

 Purple scale of the orange. Lepidosaphes beckii Newman. 

 Hop aphis. Phorodon humuli Schrank. 

 Spinach aphis, ifyzus persicx Sulzer. 

 Cabbage aphis, Aphis brassicie Liunscus. 

 Melon aphis. Aphis gossypii Glover. 

 \iPea aphis. Macrosiphum pisi Kaltenbach. 

 ..Bean aphis. Aphis rumicis Liiui«us. 

 Wheat plant louse. A phis avenx Fabric ius. 

 Pear-tree psylla. Psyila pyricola Forster. 



Tarnished plant-bug. Lygus pralensis Liniiicus. . 



Cotton stainer. Dysdercus suturellits nerrich-Schaeflcr. (Sec Cotton.) 



BEETLES (COLEOPTERA). 



Beet carrion beetle. Blitophaga opaca Unntvxis. (See Beet.) 



Red-legged ham beetle. Nccrobia rufipes De Geer. 



I^eather beetles. Dermestes vulpinus Fabricius and D.frischi Kugclaun. 



Pear borer. Agrilus simiatus Olivier. (See Pear.) 



Confused flour beetle. Triboliuviconfusum Duv. 



Saw-toothed grain beetle. Silvanus surinamensis Linns'us. 



('adello or bolting-clotli b.^etlo.' Tnubri:)idrs mnuriiariirii," l.inji:iiis. 



