Weiss — Notes on Gargaphia Tiliae Walsh. 167 



head, pro- and mesothorax and median, dorsal portion of abdomen mostly 

 dark, remainder of spines whitish; antennae and legs bearing stiff hairs; 

 rostrum extending slightly beyond bases of third pair of legs. Head bears 

 a pair of separated spines just above and between antennae, behind this 

 pair is a single, larger, median spine; posterior to this one and close to an- 

 terior margin of prothorax is a pair of large, separated spines. Prothorax 

 bears a pair of median, separated spines and one spine and several spine-like 

 hairs on each lateral edge. Mesothorax bears a pair of median, dorsal, 

 separated spines, and one spine and several spine-like hairs on each lateral 

 edge. Metathorax bears a dorsal, median pair of smaller, separated spines 

 and a minute one on each lateral edge. Median, dorsal, separated pairs of 

 spines on first and second and single, median, dorsal spines on fifth, sixth 

 and eighth abdominal segments. Lateral margins of each abdominal seg- 

 ment beginning with the second bear a single spine. Head, thoracic and 

 median abdominal spines largest; all spines arise from tuberculate bases 

 and bear one or two hairs at tip and several at sides. Wing pads indicated 

 by slight enlargements of lateral, thoracic margins. 



Fourth Stage Nymph. Length 1.4 mm. Oval; color and markings similar 

 to those of fifth stage. Antennae as long as body. Lobes of pro- and meso- 

 thorax more pronounced. Lobes of mesothorax rounded and reaching sec- 

 ond abdominal segment. Rostrum extending to just beyond bases of second 

 pair of legs. Armature similar to that of third stage except for the follow- 

 ing additions, — anterior to large spine on lateral edge of prothorax are sev- 

 eral minute spines; anterior to large spine on lateral edge of mesothorax are 

 several minute spines and hairs. Anterior to median, dorsal pair on pro- 

 thorax and close to anterior edge of prothorax is a pair of minute spines 

 with united bases. 



Fifth Stage Nymph. Length 2.1 mm. Elongate-oval; eyes prominent, 

 lateral, reddish ; antennae almost as long as body, first segment two and one- 

 half times as long as second, third segment longest, fourth somewhat 

 swollen. Wing pads extending to sixth abdominal segment. Rostrum 

 extending to between bases of second pair of legs. Base of rostrum bears 

 spine-like hairs. Head bears a pair of separated spines just above and be- 

 tween antennae, a single, median spine posterior to this pair and a pair of 

 separated spines posterior to this one and close to anterior edge of prothorax. 

 Prothorax bears pair small, median spines with united bases just posterior 

 to anterior edge; posterior to this pair is a prominent, median separated 

 pair; posterior, lateral edge bears a prominent spine with a smaller spine 

 and several hairs anterior to it. Mesothorax bears a pair of prominent, 

 median spines separated by the posterior part of the prothorax which is 

 produced triangularly. Wing pad of mesothorax bears a large spine on 

 posterior, lateral edge; anterior to this spine are two smaller spines and sev- 

 eral hairs. Metathorax bears dorsal, median pair of separated spines. Sep- 

 arated, median spines on dorsal surface of first and second abdominal seg- 

 ments. Single, median, dorsal spines on abdominal segments five, six and 

 eight. Lateral edges of abdominal segments beginning with fourth bear 

 single spines. Lateral spines on last abdominal segment are short and blunt. 

 All spines arising from tuberculate bases and bearing one or two hairs at tip 



