64 INSECT ENEMIES OF THE BOLL WEEVIL. 



coleopterous larv?e Hydnocera puhescens LeConte and H. pallipennis 

 Say are very frequently found hibernating as larvae in the boll- 

 weevil cells or in the cocoons of Microhracon mellitor. The stage in 

 which these various parasites pass the winter is given very concisely 

 in the table of the developmental periods (Table XX) in section 7. 

 During January, 1910, ^Ir. Hood repeatedly found Eurytoma tylo- 

 dermatis and Catolaccus Tiunteri hibernating in dry cotton squares 

 and bolls and especially in hanging moss at Mansura, La. 



II. THE SPRING SEASON. 



It has been demonstrated that there is a definite period between 

 the hibernation season and the first infestation of squares, extending 

 from the middle of March to the middle of June. What happens to 

 the parasites during this period is of considerable importance and a 

 great amount of work has been done in the search for intermediate 

 hosts. 



In the case of Catolaccus Tiunten the question was very satisfac- 

 torily answered. At Richmond, Tex., a large number of dewberry 

 buds infested by Anthonomus signatus was gathered March 21, 1907, 

 and this species of parasite was reared continuously between March 

 28 and April 1 . At Victoria, Tex. , Mr. J. D. Mitchell collected, on April 

 23, 1907, a lot of haws (Cratsegus mollis), infested by Tachypterellus 

 quadrigihhus, and on May 7 he reared this species of parasite. In- 

 vestigations as to the distribution of these weevils added to the 

 formerly known records of Anthonomus signatus in dewberry buds: 

 Natchitoches and Shreveport, La.; Texarkana, Ark.; Muskogee and 

 Ardmore, Okla.; and Trinity, Richmond, Waco, Dallas, and Mar- 

 shall, Tex. Tachypterellus quadiigibbus was found breeding at 

 Shreveport and Natchitoches, La., and Victoria, Tex. 



At Dallas, Tex., the buds of Galpinsia Tiartwegi were found to be 

 infested by Auleutes tenuipes as early as April 24. This species is a 

 host of several species of Catolaccus. The buds of Callirrhoe involu- 

 crata were found at Dallas to be infested by Anthonomus fulvus as 

 early as April 1, and on the same date Anthonomus seneolus was first 

 observed to be breeding in the buds of Solanum torreyi. Solanum 

 elseagnifolium, with Anthonomus seneolus both in its buds and in the 

 fungus leaf-gaUs, and Solanum rostratum with this weevil in the buds, 

 appeared early in April. All of these plants continued susceptible to 

 weevil work up to the end of the spring period, or until cotton began 

 to square. Numerous specimens of Catolaccus were reared from the 

 Solanum-infesting species of Anthonomus. 



Myiophasia senea was reared April 11, 1907, fi*om Conotrachelus 

 elegans in galls of Phylloxera devastatrix on the petioles of Hicoria 



