ISELY: EUMENID^ OF KANSAS. 245 



feet from the nest, while the other disposed of hers at a dis- 

 tance of about three feet northwest of the burrow." 



The nests were opened three days later. Both nests were 

 one-celled. One tube was nine-sixteenths inch high ; the other 

 was one and one-thirtieth inches high. Its diameter was nearly 

 one-fourth inch, inside measurement. In one case the tunnel 

 was vertical for one and one-fourth inches, and from that 

 depth curved in a westerly direction. The terminal cell was 

 slightly greater in diameter than the gallery, and was hori- 

 zontal. One cell contained an egg and two caterpillars ; evi- 

 dently provisioning had just begun. In the other cell were 

 nine caterpillars and a small grub. The cell was closed with 

 "a wad of packed soil one-fifth inch thick." 



0. geminus is a burrowing wasp, but does not cover the en- 

 trance with a tube. A part, if not all, of the pellets are dropped 

 within two or three inches of the hole. "The tunnels of 

 geminus, which were often rather closely associated, were 

 in barren soil or more or less sandy loam, with plenty of 

 lagoons in the vicinity." These burrows included a number 

 of cells, some as many as eight. The authors suggested that 

 possibly geminus utilizes its holes for a second brood, for none 

 of those examined would indicate that they were newly made. 

 One nest contained refuse of old cocoons, one presumably of 

 a parasite, another revealed three pupal cells of a muscoidean 

 fly. The lepidopterous larvse stored was probably Pholisora 

 catullus. 



In comparing the nest of the two species, 0. annulatus and 

 0. geminus, the authors suggest that the tube of the former 

 protects the nest from attacks of insect parasites. 



Several specimens of 0. foraminatus were dug out of a de- 

 cayed stump, which also sheltered a nest of Crahro inter- 

 1-uptus. The brood was apparently just emerging. The cells 

 of foraminatus were separated by mud partitions. 



Monobia quadrideyis^" nests in an old burrow of a carpenter 

 bee (Mylocopa virginica). The sides of the burrow are ren- 

 ovated by a thin veneering of clay; then the buri-ow is filled 

 with clay cells from the bottom upward. More than one wasp 

 had been seen coming and going out of a single burrow. It 

 preys on large cutworms. According to Comstock," this 

 species bores in solid wood. 



10. Psyche, May, 1894, pp. 76-78. 



11. A Manual for the Study of Insects, p. 660. 



