504 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 4 



to emerge, since when the seeds of the last mentioned lot were examined 

 on July 16, no external evidence of infestation was found. 



From the Mitchener lot of material many specimens of Conotrachelus 

 fissunguis were reared. 



Spermophagus robiniae Fabricius, Syst. El. II, 1801, p. 397. 



We have reared thi^ species from the pods of the honey locust 

 (Gleditsia triacanthos) in Texas and Louisiana and of the water locust 

 (G. aquatica) in Louisiana. The description of the species by Fabricius 

 gives the host plant as Rohinia pseudacacia. This is probably an 

 erroneous determination. Our earliest collection of pods of G. tria- 

 canthos was made on August 15, 1907, at Forbing, La. From this lot 

 the adults began emerging on August 28. Of G. aquatica pods, the 

 first lot was collected on September 19, 1907, at the same locality. 

 At this time larvae, pupse, and adults were found, but no emergence 

 had taken place. From late summer until well along in the spring 

 specimens can be bred from the pods of either species of locust, our 

 latest record being March 22, 1909, when one adult emerged in a lot 

 of G. aquatica pods collected at Shreveport, La., on January 2.5. 



This species is sometimes abundantly parasitized. From it we 

 have reared the following species, all primary: Heterospilus bruchi 

 Vier., Urosigalphus bruchi Cwfd., Eurytoma sp., Horismenus sp., Micro- 

 bracon sp., and Cerambycobius cyaniceps Ashm. Heterospilus is much 

 the most abundant of these. All of the parasite species mentioned 

 hibernate in the locust pods, probably in the immature condition. 



Pierce (1908 b) has ah-eady recorded some of the above parasites as 

 attacking S. robinice: U. bruchi, C. cyaniceps, and Eurytoma 

 tylodermatis Ashm. 



Wickham (1895) found the larvje in honey-locust in October 

 heavily parasitized by Ccenophanes spermophagi Ashm. MS., four 

 or five individuals maturing on a single host. He also reared Horis- 

 menus {Holcopelte) popencei Ashm., and records it as probably second- 

 ary through Ccenophanes. 



Caryoborus arthriticus Fabricius, Syst. El. II, p. 398. 



Charles Dury (Can. Ent. XIII, 1881, p. 20) recorded this species 

 as breeding in the seeds of palmetto (genus Sabal). In 1893 it was 

 again recorded by Riley and Howard (Ins. Life, V, 166) from the same 

 plant. Mr. J. D. Mitchell found it attacking a member of this genus 

 near Brownsville, Texas, in 1907. The adults emerged the following 

 spring, the last appearing on May 30. 



Some of the adults deposited eggs on the surface of the seeds. 

 These are opaque white, about one millimeter long, and oval in shape. 

 They are attached to the seed by a small patch of a shellac-like 

 substance. 



