6 BULLETIN 901, U. S. DEPARTMENT OF AGRICULTURE. 



small and non-setiferous, the posterior one quite large and bearing two setae; on each 

 side below the outer dorsal plates is the laterally prominent compound tubercle which 

 bears three setae instead of two as on the abdominal segments; below the compound 

 tubercle are two plates each bearing a single seta, the anterior one also bearing the 

 meso thoracic spiracle; there is a pair of tubercles above each coxa, the posterior one 

 of which bears a single seta; ventrally the arrangment of plates is similar to that of 

 the first abdominal segment except that the posterior pair of plates bear only one 

 seta each. 



The third thoracic segment is like the second but without the spiracle. 



The eighth abdominal segment is like the second, but with only one small dorsal 

 plate on each side of the posterior mid-dorsal plate. 



On the ninth thoracic segment the dorsal plates are fused into a single large one, 

 the anal shield, which bears five pairs of setae; ventrally there is a single elongate plate 

 bearing two pairs of setae. 



The tenth abdominal segment is without plates or setae. 



Measurements: Width of head: First instar 0.32 mm.; second instar 0.51 mm. - third 

 instar 0.74 mm. Average length of full grown larva 7.5 mm. 



THE PUPA. 



Similar to pupa of Altica woodsi, PL II, B. 



In general appearance this pupa is similar to the pupa of other chrysomelid beetles, 

 the dorsal line being strongly arcuate, the legs folded ventrally, bent so that the 

 femora are directed away from the median line and the tibiae toward it, the prothoracic 

 and mesothoracic legs over the wings and the metathoracic legs under them. 



Color bright yellow, appendages lighter. Antennal joints with a circlet of pro- 

 jections at the distal ends (four projections visible on each joint), especially con- 

 spicuous on the distal segments; elytra reaching the fifth abdominal segment, wings 

 the sixth; spiracles borne on the mesothoracic and the first six abdominal segments; 

 arrangement of setae as follows: 3 pairs on head, 1 above clypeus, 1 on inner margin 

 of the eyes, and 1 slightly above and between the eyes; on prothorax, 8 pairs; on 

 mesothorax and meta thorax, 2 pairs; on abdominal segments 1 to 8, 4 pairs in a row 

 near the posterior dorsal margin; and on segment 9, 4 pairs around the anal hooks; 

 3 setae on the distal end of each femur. Length 5 mm. 



DISTRIBUTION. 



The grapevine flea-beetle is found in the eastern half of the United 

 States and in the Canadian Province of Ontario. In entomological 

 literature and in the fdes of the Bureau of Entomology it has been 

 recorded from the District of Columbia and from the following States: 

 Massachusetts, Vermont, Connecticut, New York, Pennsylvania, 

 New Jersey, Delaware, Maryland, Virginia, West Virginia, North 

 Carolina, Georgia, Florida, Ohio, Indiana, Illinois, Michigan, Wis- 

 consin, Minnesota, Iowa, Missouri, Arkansas, Texas, Kansas, Ne- 

 braska, Colorado, and New Mexico. Some of these records may 

 refer to the "small form." 



FOOD PLANTS. 



A list of food plants recorded in the literature of the species is 

 given under history. The writer has collected it only on cultivated 

 grapes ( Vitis spp.), on various species of the wild grape (Vitis spp.), 

 and on Virginia creeper (Parihenocissus quinquefolia) . 



