174 Maine Agricultural Experiment Station. 1918. 



ALTICA ROSAE, SP. N., THE ROSE FLEA-BEETLE. 



Technical Descriptions of the Stages. 



description of the adult. 



Elongate oval, distinctly convex ; body above, brilliant cupreous, with 

 metallic reflections ; antennae piceous, the proximal segment cupreous and I 

 quite smooth, the rest pubescent with white setae ; slightly more than one- 

 half the length of the body, but less than twice the width of the protho- I 

 rax at its base ; segment 3 longer than segment 2 and very nearly, if not \i 

 quite as long, as segment 4 ; segment 4 about two and a half times as long , 

 as wide; segment 10 not more than twice as long as wide, usually less; 

 eyes black, not prominent, their width as seen from the front less than I 

 one-half the interocular distance; frontal carina moderate, acute; frontal 

 tubercles moderately large, flat, almost continguous ; vertex not punctate ; I 

 width of head across the eyes about two-thirds that of the prothorax at 

 its widest point. 



Prothorax one-half wider than long ; margin well defined ; base 

 scarcely wider*, than the apex, regularly arcuate ; sides nearly parallel at I 

 the base, convergent at the apex ; basal angles slightly dentiform, promi- J: 

 nent; apical angles obliquely truncate; surface comparatively finely but I 

 quite densely punctate; ante-basal groove well defined and entire, though; 

 sometimes apparently evanescent at the extremities. 



Elytra across umbones one-third wider than the base of the prothorax; 

 each elytron slightly more than three times as long as wide, and slightly 

 more than two times as wide as the base of the prothorax, surface minutely , 

 alutaceous, comparatively coarsely but densely punctate; humeral angles 

 obtuse, decidedly rounded; umbo not prominent; post-humeral depression | 

 not strong. 



Scutcllum colored like the elytra, sparcely punctate. 



Body beneath colored like the elytra ; abdomen quite densely beset : 

 with fine white setae ; legs colored like the body, except the under surfaces j 

 of the tarsal segments which are brown ; the claws are red brown ; the 

 setae and pulvilli are white. 



Last ventral segment of male sinuate each side ; lateral lobes com- 

 paratively large ; medium lobe short, semicircular, flat, the extreme edge 

 sometimes reflexed. The last ventral segment of the male is exactly 

 similar to that of A. corni, as shown in figure HE. 



Length 3 mm. 



Type locality, Orono, Maine. Male designated as type deposited in 

 the collection of the Maine Agricultural Experiment Station, Orono, 

 Maine. Paratypes (which are also topotypes) deposited in the collection i 

 of the Maine Agricultural Experiment Station, Orono, Maine; of the 

 Boston Society of Natural History, Boston, Mass. ; of Wesleyan Univer- j 

 sity, Middletown, Conn. ; of Cornell University, Ithaca, N. Y. ; and of the 

 United States National Museum, Washington, D. C. 



