BIOLOGICAL NOTES ON THE PARASITES. 87 



8 to 1 1 days, and in September from 9 to 12 days. During August it 

 was ascertained thai the entire developmental period exceeds 26 days. 



The larva 1 of Cerambycobius are described in the breeding notes 

 as while, transversely lineolate, with a row of prominent hairs around 

 the middle of each segment. The pupae are elongate brown, with a 

 short, obtuse, erecl ovipositor, and with the dorsum of the abdomeu 

 marked with two dark spots on each segment. The brown exuvhim 

 Is easily recognized from the ovipositor. The pupa* may be easily 

 distinguished from those of Microdontomerus after a little practice. 

 (See figure of pupa, PI. I, fig. .*».) 



Secondary parasitism: On September 14 a female Cerambyco- 

 bius was bred from a larva which was found feeding on a Catolaccus 

 pupa in material collected August 28 at Calvert. Although numer- 

 ous cases of parasitism of Bracon mellitor were found, only 11.5 per 

 cent of this species were secondary parasites. It was found as a 

 secondary parasite on Bracon as follows: 



Beeville, Tex., July 12. 1 female. 

 Corpus Christ i, Tex., July 10, 1 female. 

 Cuero, Tex., August 31, 1 female. 

 Mansfield. La., August 24, 2 females. 

 Trinity. Tex., August 9, 1 male, 1 female. 

 Victoria. Tex.. September 1, 1 female. 

 Waco. Tex., August 28, 3 males, 10 females. 

 Waco, Tex., September 19, 1 male, 2 females. 



In one case the attack of the Bracon is known to have been prior to 

 spinning. 



5. Catolaccus incertus Ashm. This species has been one of the most 

 important species mentioned in the literature of the boll weevil. 

 It was described as a primary parasite of Anthonomus signotus 

 (Chittenden, 1893a). It w r as reared by F. H. Chittenden from Apion 

 decoloratum Sm. breeding in Meibomia paniculata at Washington, 

 D. C, from Apion griseum Sm. breeding in Phaseolus perennis at 

 Washington, D. C, and from Bruchus exiguus (Chittenden, 1893b). 



Two females were bred by the writer October 16, 1905, from Antho- 

 nomus disjunctus breeding in the heads of Heterotheca subaxilla/is 

 collected at Jacksonville, Tex. From Anthonomus eugenii breeding 

 in peppers at San Antonio, Tex., F. C. Pratt bred 3 females on 

 October 18, 1905. From Anthonomus albopilosus breeding in the 

 seed of Croton engelmanni at Johnsons Bayou, La., the writer bred 

 2 females on September 6, 1906, and from the same weevil breeding 

 in Croton ca pitatus at Leesville, La., the writer bred 1 female on Sep- 

 tember 29, and subsequently 3 females and 3 males. 



Catolaccus incertus is very common in all parts of the State and is 

 well established as a boll weevil parasite. (See Plate III, E.) It is 

 a continuous breeder, attacking the weevil larva? and pupa?, one 



