SCYMNUS. 261 



transverse one behind the middle extending nearly to the sides 

 and to the suture. Under surface black, tibiae and tarsi very 

 obscurely rufo-piceous. Abdominal plates shorter than the first 

 segment of the abdomen. 

 Lake Superior. 



Scymnus myrmidon. 



Scymnus myrmidon, Muls. Spec. p. 954. 9. 

 N. America (Dejean). 



Scymnus flavifrons.* 



Scymnus flavifrons, Melsh. Pr. Ac. Phil. in. p. 181, Lee. I. c. 

 p. 136. 



Rotundatus, convexus, niger, punctatus, bi'eviter pubescens, 

 elytris, macula utrinque pone medium, ore tibiis tarsisque flavis. 

 L. -08. 



Rounded, convex, black, shining, distinctly punctured, covered 

 with fine grey hair; mouth and its organs yellow. Thorax 

 narrowed in front, scarcely rounded on the sides, finely margined 

 at the base, which is truncate in front of the scutellum, and 

 obliquely sinuous each side. Elytra with a large round yellow 

 spot at the posterior third, and equidistant from the sides and 

 suture. Body beneath entirely black, tibiae and tarsi yellow. 

 Abdominal plates shorter than the fii"st segment; their posterior 

 margin is parallel with the margin of the segment and reaches 

 the side as in S. guttulatus. 



New York and Pennsylvania. 



Scymnus guttulatus.* 



Scymnus gultulatus, Lee. Pr. Ac. Phil. vi. p. 136. 3 (1852). 



Ptotundatus convexus, niger nitidus, punctulatus, pubescens, 

 elytris gutta parva utrinque ad medium, alterisque duabus pone 

 medium rutis. L. "08. 



Slightly oval, rounded, and convex, black, finely punctnlate, 

 tolerably densely pubescent. Thorax somewhat narrowed in 

 front, very slightly rounded on the sides, not margined at the 

 base, which is scarcely sinuate. Elytra more distinctly punctured 

 than the thorax, marked with a small round red spot at the 

 middle about the internal third of the breadth, and two others 

 placed transversely about two-sevenths from the apex, of which 

 the exterior is the larger and slightly oblique. Under surface 

 entirely black. Abdominal plates a little shorter than the first 

 joint of the abdomen. 



San Francisco, California. 



Scymnus bioculatus. 



Scymnus bioculatus, Muls. Spec. p. 960. 20. 

 Scymnus bioculatus, Lee. Proc. Phil. p. 136. 5 (1852). 



