1916] ECONOMIC ZOOLOGY ENTOMOLOGY. 161 



certain numbers of eggs were deiwsited at all times of the day and during the 

 nit;ht. Tlie average period from oviposition to the emergence of the adult was 

 practically 14 days fur each of the five generations. 



" Seven complete generations were developed at Tallulah during the season." 



Boll weevil in Alabama, W. E. Hinds (Alabama Col. Sta. Bui. 18S (l'J16), pp. 

 23-64, pis. Jf, fl(js. 3). — This general account deals with the spread of the boll 

 weevil in Alabama, describes and illustrates the stages and work of the weevil, 

 and discusses the means of spread, propagation, hibernation, and control 

 measures. 



Oviposition of Meg^asti^mus spenuotrophus in the seed of Douglas fir, J. M. 

 MiLLEii {U. S. Dept. Agr., Jour. Agr. Research, 6 {1916), No. 2, pp. 65-6S, pis. 

 3). — This account of the oviposition of the seed chalcidid M. spermotro pirns is 

 based upon observations made at the Forest Insect Station of the Bureau of 

 Entomology of this Department at Ashland, Oi'eg., largely during the season of 

 1915. 



During the season of 1914 male adults began to emerge on April 12 and the 

 females on April 16 from stored Douglas fir seed kept In a rearing box; 2,897 

 adults emerged from 6.75 oz. of seed, the period of maximum emergence occur- 

 ring between April 23 and May 11. In 1915 the maximum period of emergence 

 in the laboratory occurred between April 20 and May 2. Prom cones which 

 were kept caged over winter under outdoor conditions at the same elevation, 

 the maximum emergence occurred between May 1 and 16. At elevations of 

 3,000 to 4,000 ft,, the emergence occurred during the latter part of May, and 

 above 4,000 ft. much of the emergence occurred in .Tune. 



The oviposition of two females was recorded on April 22 and that of the 

 same number on April 23, and females were oliserved ovipositing from this 

 time up until May 5. From two to five minutes were required for oviposition, 

 the same female having been observed to oviposit five times on the same cone. 

 Actual oviposition in the field was observed only once and that on May 28, by 

 J. E. Patterson. 



Life history and habits of two new nematodes parasitic on insects, J. H. 

 Merkill and A. L. Fokd (f/. /S'. Dept. Agr., Jour. Agr. Research, 6 (1916), No. 3, 

 pp. 115-127, figs. 3). — Two new nematodes have been observed at the Kansas 

 Experiment Station, one parasitic on the elm borer and the other on the 

 termite Leucotcrmes lucifngus. When 121 beetles obtained from a single elm 

 tree were kept in breeding cages in no instance were eggs deposited and both 

 sexes eventually weakened and died, examinations showing death to have been 

 due to nematode parasitization. Several colonies of L, luciftigus were exam- 

 ined and 76.92 per cent found parasitized by nematodes. 



Specimens of these nematodes were submitted to N. A. Cobb of this Depart- 

 ment, who describes the species which parasitized the elm borer under the name 

 Diplugaster lahita u. sp., and that of the termite under the name D. ucrlvora, 

 n. sp, 



" The eggs of D. labiata hatched in from 30 to 32 hours, while those of D. 

 aerivora hatched in about 18 hours. The eggs of D. labiata were deposited 

 singly, while those of D. aerivora were deposited in groups. More cases of eggs 

 hatching in the body were found in D. aerivora than in D. labiata. The eggs 

 of both species developed similarly. 



" Both species, when reared in water cultures, used the same food, but in 

 nature they had different hosts. Both species molted, but the proce.ss differed 

 in that D. labiata fastened its posterior end, while D. aerivora did not. The 

 adults of D. aerivora were larger than those of D. labiata and required much 

 less time to mature. In water cultures the females of both species were more 



