MEANS OF PRKVKNTION AND CONTROL IO55 



number of individuals of Hemiberlesia fissidens (Ldgr.) var. constricta Ma- 

 len., on the shore of El Sai. 21st June 1913 ; (t6) C. paolii Malen. n. sp., 

 on the leaves of Mariscus chactophyllus at Bour-Meldac, 23rd July 1913 ; 

 (17) Lepidosaphes [Coc corny til us) somalensis Malen. n. sp., on the trunk bark 

 of Acacia Asak with Pseudaonidia (^^af/rmyfo/rt^rt Malen., at Allengo, Sep- 

 tember 1 91 3. 



825 - Some Miscellaneous Economic Insects found in New Jersey. — weis.s harry b^ 



in The Canadian Entomologist, Vol. Xlylll, No. 4, pp. i.;i-i43. I,uii(lun, April 1916. 



Callopistriafloridensis Guen. ("Florida fern-cutworm"). — This insect, a 

 lepidopteron already recorded by the Author as doing considerable damage 

 to ferns in greenhouses, was found to be effectively controlled by spraying 

 with fresh pyrethrum, one ounce to one gallon of water, plus one half ounce 

 of soap. Also applied with a bellows with similar results. 



Phytomyza cht ysanthemi Kowarz ("Chrysanthemum leaf miner" or "mar- 

 guerite fly"). - — This insect does considerable damage to chrysanthemums in 

 various greenhouses in northern New Jersey. The larvae mine the leaves. 

 Nicotine solutions are effective against this insect, in place of the more or 

 less unsatisfactory method of picking oft" and destroying infested leaves. 



Oberea tripunctata Svederus (" dogwood twdg-girdler"). — This coleop- 

 teron causes withering of the leaves of Cornus florida at the tip of the 

 infested shoot. It is widely distributed in New Jersey, but as a rule does 

 not occur in sufficient numbers to do any considerable damage. 



Hemichionaspis aspidistrae Sign. — In many fern houses in New Jer- 

 sey this scale insect is a dangerous pest. It is also continually introduced 

 on Aspidistra plants imported from Belgium. There is no satisfactory re- 

 medy, and infested leaves are usually pulled off and destroyed during re- 

 potting or turning over the stock. 



Isisoma orchidearum Westw. ("Cattleya fly"). — ^This Chalcid, known as 

 the Cattleya fly, deposits one or more eggs in the buds of Cattleya, and de- 

 velopment and pupation take place inside. The pest is found in practic- 

 ally all orchid houses of New Jersey where Cattleya species are grown, and 

 is also continually introduced in orchids imported from South America. 

 Fumigation with nicotine extracts is recommended to kill the adults. 



AphropJiora parallela Say and Cecidomyia resim'cola O. S. — Observed 

 on pine trees in nurseries, but no injuries to the trees could be detected. 



Corythiica arcuata Say. This lace bug is found on the leaves of oaks and 

 other trees in various parts of New Jerse}'. 



826 - Dr'plogaster labiata n. sp. and D. aerivora n. sp., Nematode Parasites me.ws 



of Saperda tridentata and Leucotermes lucifugus, in Kansas. — >Ier- qf prevention 



RlLj.H.and 1-CRD A. I,, in /(»((r;«j/ ri/ .4-)/(H/7»;<f/ iv'r.siwf/?, Vol. \"I, No. 3, i>p. 1 15-127, ..vnd CONTROL 



Fig. 1-3. Washingtfin L>. C, April 17, kjK). 



A description of the life cycle and habits of two new nematodes Diplo- 

 gaster labiata and D. aerivora, found as parasites of Saperda tridentata Oliv. 

 ("elm borer") and of the white ant Leucotermes lucifugus Rossi. 



D. labiata lives in the digestive canal of Saperda. The numbers pre- 

 sent therein are so large that the walls of the intestine are broken, the abdo- 

 minal cavity is invaded, and the death of the insect caused. 



