62 EXPERIMENT STATION RECORD. [Vol.40 



solution at the higher temperatures but less so at 32° F. The evidence seems 

 to establish the fact that steeping for 20 minutes in a 2 per cent solution, either 

 of lysol or the cresol soap, is quite effective provided the temperature is not 

 below 50°. 



The orange papilio and its natural enemy, Pteromalus caridei, P. Cahide 

 Massini and J. Brethes (An. Soc. Rural Argentina, 52 (1918), No. 2, pp. 75-76, 

 pis. 2). — A brief account of Papilio thoas thoantiades, which attacks citrus 

 foliage, and the value of P. caridei in its control. 



Some notes on the natural control of the cherry tree ugly nest tortricid 

 (Archips cerasivorana), A. B. Baxrd (Agr. Gaz. Canada, 5 {1918), No. 8, pp. 

 766-771, figs. 6). — This tortricid is said to occasionally become very abundant 

 over large areas in eastern and western Canada during June and July on the 

 choke cherry (Prunus virginiana), making the trees very unsightly by spinning 

 its large tentlike web. The present paper deals largely with measures of con- 

 trol, especially by insect parasites, based upon studies largely at Frederic- 

 ton, N. B. 



A study of tobacco worms and methods of control, L. B. Edrozo (Philippine 

 Agr. and Forester, 6 (1918), No. 7, pp. 195-209). — The author here outlines the 

 life history of several tobacco worms occurring in the Philippines, together 

 with remedial measures. The pests considered are the tobacco cutworm 

 ( Prodenia litura), Chloridea assulta, the tobacco stem borer (Gnorimoschema 

 heliopa), Plusia eriosoma, and the tobacco hornworm (Achcrontia lachesis) . 



The tick as a possible agent in the collocation of the eggs of Dermatobia 

 hominis, L. II. Dunn {Jour. Parasitology, 4 {1918), No. 4. pp. 154-158). — The 

 author presents evidence obtained in the Canal Zone. Panama, which leads him 

 to consider that a tick, probably Ambylomma cajcnnense, not only acts as the 

 carrier of the eggs of I), hominis but is also instrumental in assisting the larv.t? 

 to penetrate the skin. 



The presence of lateral spiracles in the larva of Hypoderma, G. H. Car- 

 penter and F. J. S. Pollard (Proc. Roy. Irish Acad., 84 (1918), No. 4. Sect. B, 

 pp. 73-84, pis. 6). — A report of anatomical studies. 



Work and parasitism of the Mediterranean fruit fly in Hawaii during 

 1917, C. E. Pkmiik.rton and H. F. Wii.lard (Jour. Agr. Research [17. S.]. 14 

 (1918), No. 13, pp. 605-610) .—This is a report of work by the Bureau of 

 Entomology of the U. S. Department of Agriculture conducted in 1017 in con- 

 tinuation of that carried on since 1913 as previously noted (E. S. R., 38. p. 659.) 



During the year tliere was a rather heavy infestation of several varieties of 

 fruits, some of which were badly infested. Details relating to these are pre- 

 sented in tabular form, as is information on the percentage of larval parasitism 

 of Ceratitis capitata and total parasitism by months of all larvae of C. eapiiata 

 collected in Hawaii during 1917. 



There was a 17 per cent reduction in the abundance of the fruit By during 

 the year, and this was entirely due to parasitic importation. This reduction 

 in the numbers of the fly brings little relief to its favored host fruits, but those 

 fruits classed as unfavored hosts show a marked improvement in the degree 

 of infestation and some may become almost wholly free from larva?. The propa- 

 gation of such fruits and the encouragement of the parasitic method of control 

 is thought to be the most favorable method of contending with this pest in 

 Hawaii. It is also considered of importance in contributing toward reducing 

 the chances of introduction to the mainland. 



The total parasitism by all species during 1917 was 14.3 per cent higher than 

 in 1916. The average infestation of all fruits combined was, however, not strik- 

 ingly different from that of 1916. The parasitism by Opius humilis was 4.5 per 



