BIOLOGICAL NOTES ON THE PARASITES. 37 
8 to 11 days, and in September from 9 to 12 days. During August it 
was ascertained that the entire developmental period exceeds 26 days. 
The larve of Cerambycobius are described in the breeding notes 
as white, transversely lineolate, with a row of prominent hairs around 
the middle of each segment. The pupe are elongate brown, with a 
short, obtuse, erect ovipositor, and with the dorsum of the abdomen 
marked with two dark spots on each segment. The brown exuvium 
is easily recognized from the ovipositor. The pupxz may be easily 
distinguished from those of Microdontomerus after a little practice. 
(See figure of pupa, Pl. I, fig. 3.) 
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 Christi, 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 signatus 
(Chittenden, 1893a). It was 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 disjyunctus breeding in the heads of Heterotheca subaxilaris 
collected at Jacksonville, Tex. From Anthonomus eugeni 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 capitatus 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, #.) It is 
a continuous breeder, attacking the weevil larve and pup, one 
