134 FIRST ANNUAL REPORT OF THE STATE ENTOMOLOGIST. 



age St. Lawreace county may be obliged to sustain on its accounts 

 Acres of pasture can be seen without a spear of grass upon them." 



Description of the Caterpillar. 

 The caterpillars which I collected in the towns of Morley and Pots- 

 dam, and which I saw at those places slowly traveling over the herb- 

 age, lying dead upon the ground, attached to spears of dead grasses, 

 or taken from their retreats among the roots of the grass, 

 were, beyond doubt, the authors of the above-noticed rav- 

 ages, although at no time detected in the work. Their ap- 

 pearance is shown in Fig. 30, and may be described as fol- 

 lows : They were of a slender, cylindrical form with the 

 normal number of legs — sixteen. Their color was usu- 

 ally sordid or obscure greenish, with a shining black head 

 of rather more than one-half the diameter of the body, and 

 the upper part of the following segment, brown. Their 

 markings were in spots, and not in lines. On the upper 

 side of the principal segments (differing always on the 

 front ones) there were four glassy, slightly elevated, brown 

 spots, each bearing a black hair of about the length of one- 

 third the diameter of the body ; of these the anterior pair 

 of each segment are broadly oval and two-dotted, the outer 

 Fig. 30. — dot having the hair, and the posterior pair elongate-ellipti- 



Caterpillar of ,.,,,. ., \ ,. ^ ,, ■ -, r- 



the Vagabond cal With the liau' upou its outer portion. On the side of 

 CRrMBt^sTuT- ^^^^ body, immediately over the small black spiracle or 

 QivAGELLDs— brcathing-porc is a subtriangular brown spot (also bearing 

 ural size. a hair), an arm from which extends downward behind the 

 spiracle, partly surrounding it. Beneath the spiracle is a less conspicu- 

 ous, elonofate-oval, brown spot, in which are two short hairs. Below 

 and somewhat back of these is an oblique-oval, brown spot with a long 

 hair. Still downward and directly over the base of the prolegs is an 

 obscure crescentiform spot, in which some black points (four or more), 

 bear minute, blackish hairs. The joints of the thoracic legs are 

 marked with brown outwardly, and the plantaeof the prolegs (the small 

 prehensile hooks encircling their tips) are blackish.* The average 

 leno-th of the larvse was about three-fourths of an inch. It was sub- 

 sequently found that they had at this time about attained maturity. 



The Species not Determined at the Time. 



I was unable, at the time of my visit, to determine whether or not 

 the depredator was that of Leiicania unipimcta. If that species, it 



*The details of this description and the figure are from alcoholic examples. 



