Ecological and Behavior Notes 43 



lowing May. Another cocoon, which was identical with 

 the above, was found in a sumac stem taken at Meramec 

 Highlands on October 4, 1919. This specimen gave evi- 

 dence of having been parasitic upon Ceratina calcarata; 

 pellets of bee-bread, identical with those made by this 

 bee, were found in the chamber. Hyper-parasites which 

 could not be identified emerged from the cocoon, and the 

 only evidence that the original parasite was G. anguina 

 was the striking similarity of the cocoon. One other 

 specimen, identified as G. anguina by Mr. R. A. Cushman, 

 gave conclusive proof that the host is Ceratina calcarata. 

 A sumac stem containing a nest of C. calcarata was 

 brought home from Meramec Highlands on July 6, 1918. 

 The bottom cell contained the cocoon of this parasite, 

 and above this were eight cells with pellets of bee-bread 

 and larvae of various sizes. It was not until the first day 

 of May of the following year that the adult of Grotea 

 anguina emerged, making a period in the immature 

 stages of at least ten months. 



Gast eruption tarsatornis Say. [S. A. Rohwer]. One 

 specimen was obtained from an elder twig taken at Mera- 

 mec Highlands on May 20, 1918. The date of emergence 

 was not ascertained. The other twigs in the same lot 

 contained Hypocrabro stirpicolus; probably this wasp 

 was its host. These parasites, in an immature condition, 

 were found in a broken twig on the ground at Cliff Cave 

 on April 21, 1920. During the last week of May, three 

 adults emerged. 



Ophion hilineatus Say. [S. A. Rohwer]. Several adult 

 specimens were entrapped at the light on May 19, 1915. 



Psilomastox vulpinus Grovenhorst. [R. A. Cushman]. 

 On the vegetation at Wickes, May 28, 1920. 



Amhlyteles malacus Say. [S. A. Rohwer]. One speci- 

 men taken in the city on July 25, 1918. 



Amhlyteles sp. [S. A. Rohwer]. One adult emerged 

 from a lepidopterous pupa clinging to a horse-weed stem. 



Ptinohius magnificus Ash. [S. A. Rohwer]. A twig con- 



