New York Agricultural Experiment Station. 319 



Fig. 22. — Third Stage Nymph. 



fourth longer. The second tarsal joint of legs I is shorter, and on legs III is longer 



than on legs II. Claws, strong and recurved. Stout hairs arise in rows on the 



body and appendages, and other smaller hairs are irregularly placed. 

 Color, pale yellow; sometimes a tinge of green about the thorax; an orange-yellow 



spot occurs on the median of the third 

 abdominal segment. Segmented append- 

 ages pale. 18 



Third Instar. — Body, of medium size; 

 elongate-oval; broad; long; lateral margins 

 narrowest behind the eyes; lateral thoracic 

 margins almost parallel. Abdomen, as 

 wide as thorax to third segment; gently 

 tapering behind. Head, quadrangular; 

 flattened at the front margin; lateral 

 margins diverging widely at the eyes. 

 Eyes compound, extending beyond the 

 head. A number of hairs are regularly 

 placed transversely in rows on the several 

 portions of the body and its appendages. 

 Integument covered with microscopic 

 hairs. 



Prothorax, very slightly shorter than the 

 head; narrowest behind the eyes; widening 



to the posterior lateral angles, which are sub-angular; hind margin slightly wider than 



the transverse diameter of the head through the eyes. Mesothorax, about one-third 



wider and one-seventh longer than the prothorax; narrower than the metathorax, 



anterior lateral angles curved; posterior 



lateral angles strongly curved, projecting 



considerably beyond the hind margin of the 



segment. Metathorax, one-eighth wider 



than the mesothorax and three times the 



length of prothorax; hind margin strongly 



curved, posterior lateral angles extending 



slightly caudad. 



Appendages. — Antennas, strong; first joint 



about one-half the length of the third, 



the second article about two and one-half 



times the length of the first; the fourth is less 



than twice the length of the basal joint. 



Legs, long and slender; femora III, one-third 



longer than femora I and somewhat longer 



than the second pair. Tibiae I about one- 

 third shorter than tibise II, which are two- 

 thirds as long as tibiae III. Tarsal joints, 



proportionately longer than in the previous 



stages. Hairs, situated on the body and 



appendages as in previous stages; they are 



relatively smaller in size. 

 Color, pale green with a yellow spot on the median of the third abdominal segment. 



Eyes dark red. Margins of thoracic segments with a yellowish tinge. 1 ' 



lB Pratensis nymphs of the second stage are broader and have a median abdominal 

 spot similar in position and color to the preceding instar. The prothorax is 

 but slightly longer than the mesothorax. The apical article of the antennae 

 is the longest. 



"At the third instar pratensis is strongly green in color. On the pro- and meta- 

 thorax are four small black spots situated on either side of the median. The 

 thorax is more rectangular than that of invitus and the head is more angular. 

 The third and fourth antennal joints are about equal. The legs are strikingly 

 banded and suffused with reddish brown. 



HoifKlU 



-Fourth Stage Nymph. 



