INSECTS OF TIMBER, TIMOTHY, AND TOBACCO. 



213 



TIMBER. 



* Nacerdes inelanura Linnaeus. 

 (Timber Beetle. (Edemeridae ; Ooleoptera.) 

 Host: Bores in wharf timber, creosoted and untreated piling, paving blocks, and 

 pine flooring. 

 Injury: Reported as doing considerable damage at Auckland, New Zealand. 

 Description: Beetle 12 mm. long, elongate, subdepressed, brownish yellow or red- 

 dish, with yellowish pubescence; dilated sides of thorax, femora, tibiae, and tips of 

 elytra blue or blackish. Pupa 16 mm. long, creamy colored, with two median and 

 two lateral protuberances on apical segment. Larva 24 mm . long, cylindrical, tapering 

 toward apex; creamy colored, front of head light brown; mandibles black; legs short; 

 third and fourth abdominal segments swollen beneath and with two protuberances 



each; ninth abdomi- 

 "X a y' /•'Ov ^^^ segment some- 



"^~*' ^ what bent, with 



transverse fissure at 

 apex. 



Distribution: Eu- 

 rope, introduced 

 into New Zealand. 

 Eastern United 

 States. 



Brown, T. Tenth 

 Kept. New Zea- 

 land Dept. Agric, 

 1902, pp. 460-463, 

 figs. 1-7. 



TIMOTHY. 



{Phleum pratense 



Linnaeus. Family 



Gramineae.) 



Fig. 101. — Tobacco white fly {Aleyrodes iabaci): 1, pupa case, dorsal view; 2, 

 pupa case, ventral view; 2a, larval leg; 3, more mature pupa case, dorsal 

 view; 4, adult male; 4a, male antenna and eye; 46, tip of tarsus; 4c, tip of 

 male abdomen. (Targioni-Tozzettl.) 



extensively cultivated in America for hay. 

 found under Grains and Grasses. 



This grass is a na- 

 tive of Europe now 

 A discussion of its insect pests will be 



TOBACCO. 



(Nicotiana tabacum Linnaeus. Family Solanacese.) 



Tobacco is grown in many parts of the world and is a very important article of 

 commerce in various forms. Commercial importation^ generally consist of manufac- 

 tured products, loose leaf, stem, and seed. The greatest dangers lie in the manu- 

 factured products and loose-leaf tobacco. There are at present no quarantine re- 

 strictions on tobacco. The tobacco plant has many very important enemies in for- 

 eign countries, which are not extremely likely to enter the country in connection 

 with tobacco shipments, but which should be guarded against. Many of these 

 important insects are listed to assist in the work of identification. 



A. BETTER KNOWN TOBACCO INSECTS LIKELY TO BE IMPORTED. 



Aleyrodes spp. 



(Tobacco White Flies. Aleyrodidse ; Hemiptera.) 



Species: J.. to6aa Gennadios; Greece; tobacco. (See text fig. 101.) >j< Trialeurodes 

 vaporariorum Westwood, cosmopolitan; many hosts. 



