1054 EXPERIMENT STATION RECORD. 



lists IS ndditionnl species of food plants wl^icli tlie whitefly sometimes infests, 

 rhlii.ilu'ri-y and umbrella trees are consideretl as the food plants most to be 

 ft'Mn-d by citnis-^rowiiiK communities. Investigation has shown that whltefly 

 larva' and pu|i!i' can i-ontinuc to live on leaves which have dnjpped from trees 

 dnriii),' winter if protected against complete drying up and that these insects 

 may mature sntliciently late in the spring to infest the new leaves. Defoliation 

 is not rivonun-'uded as a means of checking the whitetly in a grove except when 

 the defoliation has already been in a great measure accomplished by a freeze. 



The author has found the citrus whltefly in Florida to consist of two dis- 

 tinct species and here presents a description of the second, a new species to 

 which he has given the name Alcyrodcs nubifera. The eggs of the new si)ecies 

 are reticnlatinl instead of smooth like the eggs of .4. citri. Distinct ditferences 

 also exist in the tirst and fourth larval stages and iu the puine. The adults 

 of .1. villi have immaculate wings while those of .1. nubifera have a smoky 

 colored area near the end of the wing easily visible in the living insect with 

 the a ill of a k-ns. 



The saddled prominent (Heterocampa guttivitta), Edith M. Patch (Maine 

 Sta. Bill. 161, pp. 311-350, i)1s. 8, fig. /).— The author reports H. guttivitta to 

 have denuded vast areas of hard wood forests in Maine in 1907 and 1908. 

 Studies made of the life history and habits and descriptions of the several 

 stages are presented, with suggested means of control. 



But one generation occurs in Maine. In 1908 moths emerged in greatest 

 numbers in May and early June, oviposition soon commenced and eggs hatched 

 in al»out 9 days. The larvte become full grown in about 5 weeks, during which 

 time 4 molts are passed, then enter the ground to pupate. The eggs are said to 

 be deposited singly upon the leaves, the moths apparently preferring to oviposit 

 upon the upper leaves of trees. Beech leaves were the favorite food of the 

 species but other trees and succulent plants were also fed upon. 



Piinpla pednli.'i and lehneiimon siihlatus were bred from pupie, the latter 

 sjiecies in large numbers. Of the predaceous wasps species of the Ammophilas 

 were i)articularly abundant. The adults and larvsie of Calosoma were numerous 

 in the infested woodlands, the larvje being particularly fond of fresh pupjie. 

 PteroHtiehuH liiciibinndiis was abundant in the spring of 1907 under beech trees 

 where the pup;e were hibernating. Podisus modestus was the most active of 

 the predaceous bugs in feeding upon the caterpillars. Late in July and early 

 in August various species of caterpillars were attacked by a fungus disease 

 and in some instances practically the whole infestation of saddled prominents 

 was wiped out. It is considered probable that P. modeMiis was an important 

 agent in the transfer of the spores of this fungus. A list is given of 53 species 

 of birds that are sui)i)osed to feed upon the pest in Maine. 



.\rsenicals .-ire reconnnended for use against the jiest in fruit orchards. The 

 caterpillars are readily shaken from the branches, which fact has been made 

 use of in some instances, the trees afterward being protected by sticky bands 

 on the trunk. 



A new species of the Tortricidae, C. H. Fkrnald (Cannd. Ent.. J,0 (1908), 

 \n. 10, pp. 3.'i!). 3')0). — The species here described ( Arfii/roplncc abietnnn) is 

 reported as injuring small sjjruce trees in Maine. 



Work of the Bureau of Entomology against forest insects, A. D. Hopkins 

 i./oiir. Eron. Ent.. I (I90S). \o. 0. pp. S'i3-3-'{8).—X brief account of the in- 

 vestigations made of forest insects in this country. 



Tick eradication, E. C. Cotton (Tennessee Sta. Bui. 81, pp. 53-11, figs. 7).— 

 The author has conducted an investigation of the cattle tick and here furnishes 

 information regarding its life history and habits and their relation to extermi- 

 native measures. 



