272 MAINE AGRICULTURAL EXPERIMENT STATION. I916. 



nearly straight, transverse ; legs not distinctly spined, a few- 

 weak points at tip o'f hind tibiae. Abdomen widening to 3rd 

 segment, tapering to tip, valves distinct. Length, 4 mm. 



In the final instar observed the head is distinctly more 

 pointed though the front is decidedly bulbous, ocelli are evi- 

 dent, the wing pads have developed backward so as to include 

 the first two abdominal segments, those of the mesothorax 

 being appressed to those of the metathorax and reaching almost 

 if not quite to their tips. Head with vertex produced, sub- 

 angulate, a depressed furrow crossing between the bases of the 

 antennae, ocelli slightly nearer the hind border and about equally 

 distant from each other and from the eye. Antennse 9- jointed, 

 those following the third becoming more slender and setaceous. 

 Eyes narrower, the larger part visible from below, red-brown 

 appearing transversely barred, front tumid, clypeus strongly 

 convex, beak reaching to behind 2nd coxae. Two rows of black 

 spines at tip of hind tibiae. Length 5 to 6 mm. 



This species is quite easily distinguished from lineatus in 

 the final instar by the difference in the shape of the head. In 

 spumarius this is distinctly wider than long so as to appear 

 bluntly pointed and the transverse furrow is longer than the 

 distance from its center to either the front of vertex or to rear 

 margin. The body as a whole appears broader and the color 

 is usually fairly distinct, spumarius having a yellowish tint 

 while lineatus is green with dusky or smoky tint. 



The adults present many varieties and most of these have 

 been found in Maine. Several are figured in the accompanying 

 plate (fig. 47) which shows also at bottom one of the nymphs. 



There is apparently no relation in these varieties to the food 

 plants as different varieties have been found to mature from 

 nymphs feeding on the same plant. Furthermore individuals 

 of different color varieties are found mating together, appar- 

 ently without any reference to color pattern. 



The typical form of the adult is easily seen from the figures, 

 the head bluntly angular, the body elongate oval, widest about 

 the middle, the elytra extending well beyond the end of the 

 abdomen and the length from five to six millimeters. The 

 color varies from pale gray to black and the markings in the 

 form of irregular spots, broken cross bands, or longitudinal 

 stripes. 



