} 
i 
¥ 
b STRAWBERRY ROOTWORM ON GREENHOUSE ROSES 9 
_ _ Although Dejean (8, p. 412) used the name gzlvipes for a species of 
Metachroma in his catalogue of Coleoptera, its use is held invalid 
because of the absence of description or reference to any type; and 
since Crotch (7, p. 39) was the first to use distinguishing charac- 
teristics for this variety, the authorship of the name-is credited to 
him. Crotch lists gélvipes as a variety of Paria sexnotata with the 
very brief description: “ Entirely black, legs pale.” The name is 
- evidently derived from gilvus (yellow) and pes (foot) and refers 
_ to the pale yellowish legs. | me 
| Horn (16, p. 208) indicates that the head of gélvipes is black, 
but Blatchley (2, p. 1139) shows that it may be reddish, and also that 
the antenns as well as the 
legs are pale. The writer 
_ has found that the head is 
reddish in all specimens of 
gilvipes observed, and also 
that the black of the 
elytra grades into a pale 
Van Dyke brown color 
near the tips. 
All individuals of both 
varieties of the _ beetles 
found in the greenhouses 
have been of a uniform 
size, and no _ differences 
have been noted among 
specimens from the several 
widely separated infesta- 
tions. The length ranges 
from 2.8 to 3.6 millimeters 
and the width from 1.6 to2 
millimeters. It is interest- 
ing to note, however, that 
specimens of the same va- 
rieties which had been col- 
lected out of doors were 
much larger, being 4.5 mil- - 
limeters long and 2.3 milli- ¥! Ser the as poe tore Adult of the 
meters wide. . 
When the beetles are first transformed from the pupe they are 
very light in shade, but upon exposure to the air soon acquire the 
normal coloration and markings. The ventral surface of the body 
becomes black in both varieties. | 
The four-spotted variety, guadrinotata (fig. 3), has bee more 
prevalent in greenhouses, and was encountered in every infestation 
observed; but the closely related gilvipes, with its black body and 
pale legs, has also been found simultaneously in several establish-. 
ments in considerable numbers. Practically all of the observations 
on the adult were made on individuals of the variety guadrinotata. 
i a a ee 
CAGE FOR OBSERVATIONS ON ADULT STAGE 
The type of cage used for most of the observations on the adult 
stage was a glass vial or test tube 1 inch in diameter and from 3 to 5 
: 52018—26——2 
