140 THE SOLITARY WA 8P8. 



was not well adapted to getting across the onion field, and a 

 wasp looked very absurd trying to go backward up the slippery 

 stalks for five minutes at a time without making the slightest 

 advance. In other cases she kept patiently to her feet until 

 she came to a plant that was not only easy to climb, but high 

 enough to give her a real advantage. 



In taking the spider to its final resting place, Mguttatus drops 

 it once or twice by the wayside while she inspects the nest and 

 perhaps adds a few finishing touches. At the last she backs in,, 

 dragging it after her. 



An egg that we took from a nest just after it was laid, wa& 

 fastened to the spider on the right side of the abdomen. It 

 hatched at the end of forty hours, and had a healthy larval life 

 of eight days, spinning its cocoon on July twentieth. On the- 

 fifteenth of August we found that it had flown. 



Of three spiders stung by Mguttatus, one was dead when 

 taken from the wasp. The second, taken on July sixth, seemed 

 to be quite dead until the eighth, when it gave a slight response 

 to stimulation. From this time it improved, at first slowly and 

 then rapidly, until on July fifteenth it drank water and moved 

 all its legs without stimulation. On the eighteenth it began to< 

 walk, and by the sixth of September it had entirely: regained its 

 health and was released. The third spider, which was taken 

 with the egg upon it, lived until it was destroyed by the larva.. 



Pampilus fuscipennis St. Fargeau. 

 PI. I., fig. 2; PL XIL, fig. 5. 



Tin's species, which is a little smaller than P. qumquenotaus, 

 is black, with the red girdle that appears so frequently among 

 the solitary wasps. The first time that we ever saw this wasp 

 she was running rapidly backward over the bare ground, the 

 brilliant red of her body flashing in the sunlight as she dragged 

 along a little spider of the genus Thomisns. Presently she 

 carried it up on to a leaf and began to bite at it, but being dis- 

 turbed by an ant, hurried on with a much agitated manner.. 



