December, '11] CUSHMAN: HOSTS AND PARASITES OF BRUCHID^ 497 



There is no doubt but that the parasites hibernated in the pods in 

 the immature condition. 



The only lot of pods collected early in the spring, before the new- 

 crop had become infested, produced the following species of parasites, 

 which had undoubtedly hibernated in the pods: Urosigalphus, 

 Glyptocolastes, Lariophagiis, Horismenus, and a bethylid. 



Horismenus sp., breeds very abundantly as a primary parasite, 

 ten or more maturing on a single host. This Bruchus is its only known 

 host. Urosigalphus hruchi is the most abundant parasite of B. salloei, 

 while Heterospilus prosopidis, Glyptocolastes hruchivorus, Ceramby- 

 cohius cyaniceps, C. cushmani, and Lariophagus texanus were reared 

 in considerable numbers, all as primary parasites. The others were 

 rare or occasional. All of the parasites except Horismenus and probably 

 Lariophagus and the minute chalcid breed singly. 



Bruchus prosopis Leconte, Proc. Acad. Nat. Sci. Phil., X, 1858, 

 p. 79. 



This species was reported by Leconte (loc. cit.) as abundant in 

 the pods of mesquite, Prosopis juli flora ( = glondulosa) and the screw 

 bean, Stromhocarpus, in the Colorado Desert and by Riley and How^ard 

 (Ins. Life, V, 165) as bred from the pods of Prosopis. Several other 

 authors have since recorded it from the same host plants. Our records 

 include only Prosopis. In Texas it is almost always accompanied 

 by B. amicus Horn. One female specimen of this species, received 

 from Mr. R. W. Dawson, Lincoln, Neb., was taken on Prosopis velutina 

 at Oro Blanco, Ariz., August 17, 1910. 



The only parasite we have reared from this species is Urosigalphus 

 hruchi Cwfd. However, two other species have been recorded as 

 probably parasitic on it. Heterospilus prosopidis Vier. was described 

 from specimens bred from '^ Bruchus in Prosopis juliflora," and Glypto- 

 colastes texanus (Ashm.) Cwfd. was described from specimens "bred 

 from Prosopis juliflora, where it was probably parasitic on Bruchus 

 prosopis." All of the above species are primary parasites and breed 

 singly. 



In addition to the above records notes in the files of the Department 

 of Agriculture record the breeding of the following parasites from this 

 species: Urosigalphus hruchi Cwfd., one specimen bred from Prosopis 

 juliflora, infested by B. prosopis and B. amicus, at Kingsville, Texas, 

 June 21, 1909, by D. K. McMillan; many specimens of Heterospilus 

 prosopidis Vier., four specimens of an undetermined chalcid, and 

 three of an undetermined proctotrypid wdth the same data as the 

 Urosigalphus; Heterospilus prosopidis Vier , three specimens, bred 

 from B. prosopis at Brownsville, Texas, June 17, 1908, by D. K. Mc- 

 Millan. 



