201 



as long as the preceding." (This looks like an unsuccessful 

 conatus to form another joint.) 



"June 5, 1833. Found a Hessian Fly ovipositing." "Fif- 

 teen joints (in antennas) besides the basal; the last no longer 

 than the penultimate. Query: When the terminal joint is 

 long, is it not really double ?" 



" June 3, 1833, 2 P.M. Clear day, not very warm. Found 

 a Hessian Fly ovipositing upon the leaves of the Avheat, most 

 of it 'heading out.' I was somewhat surprised at it, as I sup- 

 posed that the spring crop of Hessian Flies had long ago come 

 out, laid their eggs, and died. I secured it, but found nothing 

 peculiar about it." "Had fifteen joints (in antennse) besides 

 the basal, which last was plainly biarticulate." 



" June 7, 1833, 2 P. M. Found a male and female Hessian 

 Fly on wheat in the garden ; secured them. The male had 

 sixteen joints (in antennae) besides basal ; terminal joints larger 

 than preceding and possibly biarticulate. The male is fully as 

 long as, and I think somewhat larger than, the female." 

 " The female has fifteen joints besides basal." " Confined 

 them both in one vial. The female has laid many eggs 

 (about fifty) upon the sides of the vial and cork." Then 

 follow divers notes on the changes of the egg. 



" June 13. Several of the eggs hatched. The larvse when 

 first hatched resemble the eggs in size, shape and coloring, 

 and have some little activity; i. c, craAvl about rather slug- 

 gishly. Nothing is left of the egg except a very thin, trans- 

 parent membrane, entirely devoid of color. Whatever of color 

 the egg had is carried off by the larva." 



Mem. without date. " 9 . Antennae in one, sixteen-jointed 

 besides bibasal, but the last two are connate. 



"(?. AntennaB rather more than half as long as body; one 

 had sixteen joints besides bibasal." 



I may have other memoranda touching this point, but those 

 which I have copied above will, I think, justify my statement 

 in the Patent Office Report ; and they show that the number 



