176 MAINE AGRICULTURAL EXPERIMENT STATION. 1917. 



what pointed apically (See Fig. 12, J) ; arista brownish, a little longer 

 than antenna. Face and cheeks yellow and with light pile. Mesonotum 

 greenish aeneous with two obvious median stripes and bright yellow sides 

 clothed with light golden pile ; pleurae a somewhat lighter yellow than 

 the lateral stripes of dorsum, and with golden pile; scutellum yellow with 

 a greenish sheen and with black pile, the sides with yellow pile. Band on 

 the second abdominal segment interrupted and outwardly produced for- 

 ward where it extends over the sides and up onto the sides of the first 

 segment. The bands on the third and fourth segments run straight across, 

 extending over the sides in almost their full width. Fore coxae and tro- 

 chanters cinereous, the hind trochanters yellowish, front and middle legs 

 entirely yellow; hind pair yellow, the femora with dark band beyond the 

 middle, yellow posteriorly; hind tibiae darkened on outer side of apical 

 half and clothed with black pile; last four tarsal joints darkened. Length 

 about 11.5 mm.; wing about 11 mm. 



"Female : Width of frons at vertex about equal to length of third 

 antennal joint, but widening quite rapidly down to the antennae. Frons 

 yellow, brightly so for about one-fourth its extent above antennae above 

 this a region with a greenish-black reflection which has an ill-defined tri- 

 angular mark; the last section, which includes the ocelli, is nearly as long 

 as broad and is shining black ; a black spot above each antenna. 



"This species has been confused with ribesii, grossulariae, 



and xanthosiomus. It differs from ribesii and rectus in its bright yellow 

 mesonotal side margins; apically pointed third antennal joint; bases of 

 femora in male yellow, and second and third yellow bands of abdomen 



but little narrowed laterally the small bristles on the under 



side of the middle tarsi yellow instead of black." 



EXPLANATION OF FIGURE 8. 



Immature stages of Xanthogramma divisa Willist. 



A. Eggs o Xanthogramma divisa, the two above in dorsal view, the one 



below in side view, X 40. 



B. Characteristic sculpturing of the shell of the egg as it appears at a 



magnification of 300 diameters. 



C. Dorsal view of larva just after hatching, X 50. 



D. View of full-grown larva from the caudal aspect, X 8, to show its 



unusual flatness. 



E. End view of the posterior respiratory organ of the larva, X 115, show- 



ing circular plates, slit-like spiracles, and the irregularly-rugose 

 inter-spiracular ridges. 



F. Dorsal view of the larva, X 5, to show color pattern. 



G. Dorsal view of the posterior respiratory organ, X 40. 



H. A part of the marginal serrations of the larva more enlarged, show- 

 ing the three large and one smaller serration occurring to each seg- 

 ment and the minute, integumental papillae. 



I. Dorsal view of the puparium, X 8, showing shape and color mark- 

 ings. 



J. Outline drawing of the puparium, X 8, showing shape from the side. 

 For other figures of Xanthogramma divisa, see 9 and 12 K. 



