1922] Notes on Livia maculipennis 227 



EGG. Length, 0.3 mm. Greatest width 0.9 mm. Lemon yellow- 

 ish; elliptical, somewhat flattened on one side, bluntly pointed at 

 distal end, basal end terminating in a short projecting stipe. 

 First Nymphal Stage Length 0.4-0.45 mm. Width of head across 

 eyes, 0.12 mm. Color, pale yellowish or whitish tinged with 

 brown. General shape, subrectangular, somewhat flattened. 

 Head truncate, slightly narrower than thorax; eyes red, lateral; 

 antennae erect, cone-shaped, tip truncate and bearing two hairs. 

 Thorax with sides subparallel, slightly converging posteriorly, 

 length about one-third greater than length of abdomen, seg- 

 mentation indistinct. Abdomen subcircular to oval except where 

 it joins the thorax, segmentation indistinct, fringed with a row 

 of equidistant hairs. Sheath of rostrum extending almost to 

 between second pair of legs. Legs short, chunky, gradually tap- 

 ering toward tip which bears a sucker disk and two hairs. 

 Second Nymphal Stage. Length about 0.73 mm. Width of head 

 across eyes 0.22 mm. similar to preceding stage in color, shape 

 and general proportions. 



Third Nymphal Stage. Length about LI mm. Width of head 

 across eyes, 0.3 mm. Color, shape and general proportions some- 

 what similar to those of preceding stage. Dorsal svu-face of 

 thorax bears brownish spots. Upper surface of last few ab- 

 dominal segments brownish. Tips of legs and tips of antennse 

 brownish. Sides of mesothorax produced laterally into pi'o- 

 nounced pads. Sides of metathorax produced laterally into pads 

 less pronounced than those of mesothorax. Abdomen about as 

 long as thorax, more oval in shape than formerly and with a 

 more decided yellowish tinge, tip clothed with many fine hairs. 

 Fourth Nymphal Stage. Length about L7 mm. Width of head 

 across eyes 0.5 mm. Yellowish white. Head as wide as thorax 

 broadly rounded anteriorly. Eyes, red, prom'nent, lateral. 

 Antennse conical, erect, as long as width of head between antennae. 

 Thorax subrectangular, about as long as abdomen, sides parallel, 

 dorsal surface bearing several brownish spots. Wing pads large, 

 pronounced extending obliquely, posteriorly. Wing pads bear- 

 ing few short hairs. Abdomen oval, constricted somewhat 

 anteriorly, strongly convex, segmentation indistinct, apical 



