318 ItEroiiT of the Department ok Entomology of the 



Fig. 20a. — L. pratensis, First Stage. 



regularly placed on the several segments. A number of more prominent, longer 

 hairs are situated in rows near the margins of the segments and on the abdomen. 



Prothorax, one-third shorter than the 

 head; narrow at the cephalic margin; 

 abruptly widening to the posterior lateral 

 angles, which are strongly rounded. 

 Mesothorax, slightly (|) wider than the 

 prothorax and three-fourths as long; 

 anterior lateral angles strongly curved; 

 posterior lateral angles somewhat rounded; 

 caudal margin slightly recurved. Meta- 

 thorax, slightly narrower then the meso- 

 thorax and about two-thirds as long; 

 ventral margin somewhat incurved to the 

 median. 



Appendages. — Antenna? , of medium 

 length and strong; basal segment one-half 

 the length of segment two; second joint 

 three-fourths the length of the third and 

 fourth articles, which are of equal size; 

 terminal joint is slightly narrower than the basal segment. Legs, rather stout and 

 of medium size; femora II and III of equal length, the front pair being somewhat 

 shorter; tibia? I and II are of the same length; tibiae III about one-third longer. The 

 first article of the tarsi on legs II and III about equal in length; on legs I about \ 

 shorter. The second tarsal joint of legs I is shorter, and on legs III about one-fifth 

 longer than on legs II. Claws, strong and recurved. Stout hairs arise on the body 

 and appendages, and other smaller hairs are irregularly placed. 



Color, pale yellow; eyes red; a sizable orange-yellow spot occurs on the median of 

 the third abdominal segment. 17 



Second Instar. — Body, small; elongate-oval; broad; long; lateral margins narrowest 

 behind the eyes, gradually widening to metathorax and then abruptly to the third 

 abdominal segment. Abdomen, pyriform. Head, large; sub-triangular; broadly 

 rounded before the eyes. Eyes compound, extending beyond the head. A number of 

 prominent hairs are regularly placed on the several segments. Integument not 



punctured; numerous minute hairs cover the 

 surface. 



Prothorax, about two-thirds shorter than the 

 head; narrowest at the cephalic margin, gently 

 widening to the posterior latsral angles; posterior 

 lateral angles sub-angular. Mesothorax, one-eighth 

 wider than the prothorax and one-seventh as long; 

 anterior lateral angles sub-angulate; posterior 

 lateral angles rather strongly curved and project 

 somewhat caudad. Metathorax, equal in width 

 to the mesothorax and one-sixth as long. The 

 hind margin is strongly curved and the posterior 

 angles are noticeably extended caudad. 



Appendages. — Antennce, strong; the basal, the 

 second and the third segments vary in length as 

 last article is one-ninth longer than the third. 



Fig. 21— Second Stage Nymph. 



The 



in the preceding instar. 



The terminal and basal joints are of the same width. Legs, rather long; 

 slender; femora of about equal length; hind femora twice the width of the first two 

 pairs; tibia? I and II of equal length; the third pair are one-half longer. The first 

 article of the tarsi on legs I and II of about equal length; on legs III about one- 



1T The first stage nymphs of pratensis are more rotund and a small median black 

 line occurs at the caudal margin of the third abdominal segment, which with 

 a similar line just behind on the fourth segment, form a sizable black spot 

 The prothorax is twice the length of the mesothorax. The apical antennal 

 joint is the longest. See Fig. 20a. 



