TRIBE XX. CEUTORHYNCHINI. 443 



flower and many other cultivated and wild forms of the mustard 

 family, often doing much damage to the cultivated plants. The 

 eggs are deposited in the steins of the host plant by the hiber- 

 nated adults in April and May and hatch in five to eight days. 

 When full grown the larvae pupate in small round earthen cocoons 

 just beneath the surface of the ground, the time from egg to adult 

 being six to seven weeks. They mainly attack plants going to 

 seed in their second year and therefore seem to prefer wild cruci- 

 ferous plants like hedge-mustard, shepherd's purse and pepper- 

 grass to the cultivated forms, as they can be more readily found 

 in second-year growth. One remedy recommended is the utiliza- 

 tion of such wild plants as a trap crop near or around the plots 

 on which the cultivated ones are growing, and the pulling up and 

 destroying of the wild plants after the eggs are deposited. Spray- 

 ing the larva? and adults with Paris green or other arsenical will 

 also prove effective. 



G94 (11,077). CEUTOEHYNCHUS SULCICOLLIS Payk., 1800, 217. 



This species, also introduced from Europe, greatly resembles rapa\ 

 but is broader, and the scales are brown instead of grayish-white. Length 

 3 mm. 



Specimens were found at riummer's Island and Montgomery 

 Co., Md., June 21 and July 1, 1015, by Ernest Shoemaker. It is 

 mentioned by Chittenden (1000, 51) as the "cabbage-gall weevil," 

 an important enemy of cultivated plants of the mustard family 

 in Europe. C. cijnnipcnnls Thorns, (not Germar) is a synonym. 



685 ( ). CEUTORHYKCHUS QUADRIDEXS Panz., 1796, 13. 



Elongate, subtrapezoidal. Black, above irregularly clothed with elongate 

 dirty white scales intermixed with coarse hair-like bristles; beneath more 

 densely clothed with oval pale yellowish or whitish scales; antennae, tarsi 

 and post-ocular lobes, pale reddish-brown; basal sutural spot white. Beak 

 and antennae nearly as in rapa'. Thorax one-half wider than long, narrowed 

 and constricted as in that species; disc with two distinct tubercles each 

 side the dorsal channel, which is deep before and behind but interrupted at 

 middle. Elytra as in rapa 1 ; intervals wide, flat, marked with a row of fine 

 punctures, each bearing an erect whitish seta. Length 2.5 2.7 mm. 



Recorded in this country only from Xantucket, Mass., and 

 Long Island, N. Y., possibly only from one invasion. Redescribed 

 by Dietz under the name C. seriesetosus, but shown by Chittenden 

 to be the European C. quadridens. Known as the "seed-stalk 

 weevil," the larvae, according to Chittenden (1000, 51), feeding 

 in the roots of rape and in the seed stalks of horse-radish, cab- 

 bage, mustard, etc. 



