1919] Dicker son-W eis s : Platymetopius Ilyalmiis -371 



margin subtruncate, scarcely longer at sides than at middle; abdominal 

 hairs similar to those of fifth stage nymph; posterior abdominal spine- 

 like processes equal in length to the two posterior abdominal segments; 

 rostrum extending to between bases of second pair of legs. 



Fourth Nymphal Stage — Length, including anal processes, 4.1 mm. 

 Width of head, including eyes, 0.5S mm. Shape somewhat similar 

 to that of fifth stage ; dorsal and lateral reddish-brown markings some- 

 what similar to those of preceding stage, but more diffused, in some 

 specimens extending further medially on dorsal surface of head and 

 some of body segments; antennae about one-half length of body; eyes 

 prominent, lateral, extending slightly posteriorly; anterior margin of 

 head subacute, sides slightly rounded; prothorax rounded in front to 

 conform to posterior margin of head, posterior margin slightly curved 

 and slightly wider than anterior margin; mesothorax with lateral 

 margins decidedly elongate covering two-thirds of metathoracic lateral 

 margins; metathorax with lateral margins somewhat elongate, covering 

 part of first abdominal segment; abdomen broadest across second 

 segment gradually tapering to end; length of posterior abdominal 

 spine-like processes more than combined lengths of last two abdominal 

 segments; spine-like processes bearing long hairs; abdominal hairs 

 similar to those of fifth stage nymph ; rostrum extending almost to bases 

 of second pair legs ; few, minute spines on legs ; hind tibial spines similar 

 to those of fifth stage. 



Fifth Nymphal Stage — Length, including anal processes, 5.5 mm. 

 Width of head, including eyes, 0.78 mm. Elongate-narrow; vertex 

 acutely pointed and abdomen gradually tapering from anterior portion 

 to apex; color sordid white with dorsal and lateral surfaces and wing- 

 pads mottled with a number of orange-yellow spots often margined with 

 interrupted reddish-brown lines, spots vary in size and some tend to 

 form one or two dorsal rows; antennae more than twice the length 

 of the head, situated on front just below eyes; head acutely pointed, 

 posterior margin arcuate, eyes prominent, extending backward, forming 

 outer posterior angles ; head as long as width of broadest portion of head 

 across eyes; prothorax rounded in front to conform to the posterior 

 margin of head, posterior margin slightly curved, slightly wider than 

 widest portion of head across eyes; mesothorax about as wide as pro- 

 thorax ; median portion of mesothorax about one-half as long as width, 

 sides somewhat shorter; wing-pads long, narrow and extending to 

 posterior margin of first abdominal segment. Metathorax about as 

 long as mesothorax; wing-pads extending slightly beyond those of 

 mesothorax ; abdomen widest across anterior end and gradually tapering 

 to last segment which is terminated b}^ two, long, spine-like processes, 

 which equal in length the combined lengths of the last three segments; 

 each abdominal segment bears near its posterior margin two dorsal 

 and two subdorsal and beginning with the third segment, two additional 

 lateral, fine, long hairs which are equidistant; posterior spine-like 

 processes also bear a number of fine, long, hairs; ventral surface and legs 

 sordid white; rostrum extending beyond bases of first pair of legs; 

 hind tibia bearing a row of hairs on inner margin and a double row of 

 spine-like hairs on outer margins; few minute spines on legs. 



