502 JOURNAL OF ECONOMIC ENTOMOLOGY lVoI. 4 



one specimen was reared. Its large size renders its parasitism on 

 the Bruchus somewhat doubtful. It was probably parasitic on some 

 other insect, possibly a lepidopteron, the adult of which was not reared. 



The latest date for the rearing of Heterospilus from this host was 

 April 21, for C. cyaniceps March 6, while C. cushmani emerged in 

 December. 



Bruchus compressicornis Schaeffer, Mus. Brooklyn Inst. Arts. 

 & Sci., Science Bui., Vol. I, No. 10, 1907, p. 305. 



Bruchus bisignatus Horn, Trans. Am. Ent. Soc, 1873, p. 334. 



These two species are considered together for the reason that, 

 though the former is frequently found alone, the latter has never, 

 in our experience, been reared except in company with B. compressi- 

 cornis, and a consideration of the parasites must include both species. 



B. compressicornis was found by the writer breeding in the flat, 

 clustered pods of Acuan illinoensis on September 18, 1907, at Forbing, 

 La., and in the following summer at Victoria, Texas. We have also 

 reared it from the same plant at Tallulah and other points in eastern 

 Louisiana. From the Victoria lot several specimens of B. bisignatus 

 were reared and from the Tallulah material one specimen of this 

 species. Mr. D. K. McMillan found both species breeding abundantly 

 in Acuan at El Reno, Okla., in August, 1909. 



The first record of the breeding of B. bisignatus was published in 

 Insect Life, Vol. V, p. 286, where it is recorded as breeding in the pods 

 of Desmanthus virgatus from Mexico. Acuan illinoensis was formerly 

 known as Desmanthus brachylobius, and the specimens reared by Mr. 

 McMillan are so labelled. 



From the material from Forbing, La., which was infested only by 

 B. compressicornis and which was very highly parasitized, no adults 

 of the host were reared until the following May 16, from which time 

 they continued to emerge until June 20. The pods infested by this 

 species are prevented from opening in the same manner as the Vicia 

 pods are kept closed by B. ochraceus. 



The very high percentage of parasitism in this lot (97 per cent, 

 based on the recorded rearings) was due entirely to two species: 

 Heterospilus prosopidis Vier. and Cerambycobius cyaniceps Ashm., 

 both primary parasites. The former was much the more abundant, 

 107 individuals of this species being reared and 17 of the Ceramby- 

 cobius. Heterospilus continued to emerge from the pods of this lot 

 as late as June 20 and Cerambycobius until March 7. 



The parasites reared at Tallulah, La., were all chalcids. The most 

 abundant species was Catolaccus hunteri Cwfd. This was reared in 

 large numbers. One specimen of Habrocytus piercei Cwfd. and three 

 of Cera7nbycobius cyaniceps Ashm. were also reared. Catolaccus 



