149 



Ehrhorn (E. M.). Are the Agriculturists of Hawaii fortunate? — 



Hawaiian Forester & Agric, Honolulu, xvii, no. 10, October 1920, 

 pp. 291-294. [Received 18th January 1921.] 



Hawaii is apparently comparatively free from insect pests. The 

 necessity for continued vigilance and strict enforcement of plant 

 quarantine regulations to maintain this condition is therefore 

 emphasised. 



Full AWAY (D. T.). Termites, or White Ants, in Hawaii. — Hawaiian 

 Forester & Agriculturist, Honolulu, xvii, no. 10, October 1920, 

 pp. 294-301, 10 plates. [Received 18th January 1921.] 



Damage by termites to wood, woodwork and wood products has in- 

 creased considerably in Honolulu during recent years, and the resulting 

 losses are causing some anxiety. The species concerned have been 

 known as Calotermes marginipennis, Latr., Neotermes castaneiis, 

 Burm., Cryptotermes brevis, Wlk., and Coptotermes intriidens, Oshima, 

 but it has recently been found that the three first-named have been 

 erroneously referred to these species, and will shortly be described as 

 new. They are borers in dry wood, while C. intrudens cannot survive 

 in dry wood, but constructs nests in or near the ground. It forced 

 to build above ground, it carries soil up for the purpose. Long 

 tunnels through the earth are often constructed, leading to new 

 sources of supply. 



There is at present very little prospect of effective control of termites 

 in Hawaii by natural agencies. The nests should be destroyed wherever 

 possible by fumigation with carbon bisulphide, hydrocyanic acid gas, 

 or fumes produced by burning arsenic and sulphur. The work of 

 Oshima in Formosa with regard to resistant woods and to rendering 

 other varieties of wood resistant is described [R. A.E., A, viii, 301]. 



Ehrhorn (E. M.). Division of Plant Inspection. — Hawaiian Forester 

 & Agriculturist, Honolulu, xvii, no. 11, November 1920, pp. 

 326-327. 



Among packages intercepted or treated for infestation during 

 October 1920 were daffodil bulbs from California, infested with the 

 Syrphid, Merodon equestris, and pea seeds from Japan, which were 

 fumigated on account of weevils. 



]\IuiR (F.). The "Japanese" Beetle is GlamQSQ.— Hawaiian Planters' 

 Record, Honolulu, xxiii, no. 6, December 1920, p. 291. 



Recent investigations have shown that the Hawaiian pest that has 

 always been regarded as Adoretus tenuimaculatus (Japanese beetle) 

 is, in fact, A. sinicus, a beetle known from China, Formosa, Java 

 and Timor. The true A . tenuimaculatus feeds and flies by night, 

 whereas A. sinicus is diurnal in habit. 



This shows the value of purely scientific work in economic ento- 

 mology. For parasitic work it is necessary to know the native home 

 of a pest, and an incorrect identification may direct the search for 

 parasites to a wrong quarter of the world. 



