165 



head. Dorsum with about three wrinkles to each joint and sparsely 

 clothed with yellowish hairs each springing from a minute, rufous, pol- 

 ished point. Stigmatal line on each.side, rufous, the first between joints 

 one and two, the others placed on a lateral series of swellings, com- 

 mencing with joint four. Joints four to eleven inclusive, each with 

 eight sub-stigmatical, concolorous, shiny plates, the upper row lateral 

 and divided from the second by a longitudinal depression, the second 

 row forming tubercles, which are retracted or projected at will. Head 

 honey yellow, rounded, slightly flattened in front; epistoma and lab- 

 rum of same color; mandibles darker, triangular, with the inner edge 

 slightly excavated near the tip; antenna? apparently two-jointed, short, 

 and with the terminal joint often bifid; maxilla? well developed, the 

 inner lobe furnished with strong hairs; maxillary palpi prominent: 

 ibur-jointed; labium sub-obsolete; labial palpi forming simply two 

 small piliferous tubercles. Legs scaly, pale, setous, and terminating 

 in a brown claw. Anal joint not horny below. Length 25-30 inch. 



Of the species of this family (Chrysomelida) so far mentioned, Lema 

 trilincata and Criocerus asparagi belong to the sub-family Chrysomeli'nse. 

 The sub-family G alerucinse, as given in the table copied from Dr. Le 

 Baron's report, contains two somewhat distinct groups, which might 

 very properly, as is done by most entomologists, be separated into two 

 sub-families, as follows: 



A. Galerucinx. Hind thighs not thickened, and not adapted to 

 leaping. 



A A. Halticinse. Hind thighs thickened and adapted to leaping. 



The fir.-t of the following species belongs to the former, the next 

 species to the latter group. 



Diabrotica vittata. Oliv. The Striped Cucumber Beetle.) 



(Jaleruca 

 (diabrotica) 

 aittata, Fr.: 

 The striped 

 Cucumber 

 Beetle. 



[Fig. 27.] This species is very destructive t Fi s- 28 -l 



to the cucumber, melon and squash, 



attacking the roots and boring into 



the lower part of the stem in the 



larval or grub state, while the per-* 



feet beetle feeds on the tender 



leaves while the plants are young 



and on the buds and young shoots 



of the older plants. It is very 



common and often inflicts heavy 

 damage on the vegetable gardener by 

 its depredations. It is nearly one-quarter of 

 an inch long and half as wide; of a bright or 

 pale yellow ground color; the head is usually 

 black, but not always, as it is sometimes yel- 

 low; the thorax yellow, with two black dots 

 near the middle; wing-cases with a rather 



1 111 1 1 * Til '111 £ 1 J-'lAUIWl II ■ A U11A1A JUEUYd 



broad black Stripe along the middle 01 each, greatly magnified, the side lines 



and a narrow black border entirely around *»£&£*. JfiJ ftJnVffi 

 each. view. 



The beetles make their appearance in the spring from the middle 

 of April to early in June, according to latitude, feeding for a short 



Diabrotica vittata — Larva 



