BIOLOCJIKS OF WEEVILS CONTRIBUTING PARASITES. 17 



16. Ghalcodermus uncus Boh. is the cow pea-pod weevil, although 

 it has once been bred from a cotton square. It is recorded as a bosl 

 of Myiophasia a nea. 



17. Tyloderma foveolatum Say breeds in the stems of Onagra 

 biennis, an early summer evening primrose. Pupation takes place 

 in the larval burrow. It is parasitized by Eurytorna tylodermatis and 

 ( [ rambycobius cyania ps. 



r\:\ Toi;m NCHINI. 

 Is. AldeteS tenuipes LeC. This species was found to breed in the 



buds of Galpinsia Tiartwegi at Dallas in the spring. The larvae U^'(\ 

 within a single anther in (he bud, leaving it when the flower opens 

 and entering the ground for pupation. The entire life cycle does not 

 exceed 25 days, of which 11 days only is spent in the bud. Catolaccus 

 incertus has been bred as a parasite. 



BARINI. 



19. Orthoris crotchii Lee. is a very abundant fall weevil in western 

 Texas, breeding in the seed pods of Mentzelia nuda, a plains plant. 

 Pupation is in a cell formed within several seeds. The species is 

 highly parasitized by several species, the least of which, however, is 

 Eurytoma tylodermatis. 



20. Trichobaris texana Lee. is a stalk weevil, breeding in the stems 

 of Solatium rostratum, a plant common in waste places in the summer 

 and fall. The weevil cells are not more than an incn apart through- 

 out the stem. Cerambycobius cyaniceps has been bred as a parasite. 



21. Trichobaris trinotata Say, the potato stalk weevil, is another 

 host of Sigalphus curculionis. 



22. Ampeloglypter sesostris Lee. is a grapevine weevil, and a host 

 of Myiophasia aenea. It is not recorded from Texas. 



23. Zygobaris xanthoxyli Pierce. This new species breeds in the 

 berries of Xanthoxylum at Runge and Beeville, Tex., in the spring. 

 The larvae feed in the interior of the seed until the seed is thrown to 

 the ground. They then enter the soil and pupate in a tiny earthen 

 cell, being in the ground about a month. Catolaccus incertus has been 

 bred as a parasite. 



ANTHRIBID/E. 



24. Brachytarsus alternatus Say breeds in the stems of Sidcranthus 

 rubiginosus. It is a constant breeder, entirely riddling l he stems. 

 Microdontomerus has been bred from it. 



BRU< mi' I 



Although not considered Rhynehopliora by American writers, it is 

 very probable that the Bruchidae are a connecting link between the 

 Anthribidae and Chrysomelida:. 



