NORTH AMERICAN COLEOPTERA. 101 



This species is founded on the " singularly-colored specimen" men- 

 tioned by Dr. LeConte. It varies somewhat in its markings. In 

 two specimens before me % 9 , the humeral is short and slender, not 

 reaching the apex, while in two others the vitta is broad and entire. 

 In three specimens the abdomen is brown or piceous, in one pale 

 yellow. The form of thorax is that of limhata, and the male sexual 

 characters nearly so, but the depression of the last ventral is much 

 deeper. 



Occurs in Pennsylvania, North Carolina and Georgia. 



V. viridipennis Lee, Proc. Acad. 1859, p. 81; loc. cit. 1865, p. 207. — 

 Similar iu form to discoidea, but less elongate. Anteuuse often entirely yellow, 

 usually with the outer joints darker. Head yellow, with an occipital piceous 

 spot of variable size, usually sparsely finely punctate. Thorax wider than long, 

 sides slightly arcuate in front, straight and convergent posteriorly, disc smooth, 

 with a fovea on each side of variable extent. Elytra violet-blue or slightly 

 greenish, sparsely finely punctate. Body beneath entirely piceous. Legs yellow. 

 Length .20— .26 inch.; 5—6.5 mm. 



In the male the ventral segments 2-3-4 are gradually shorter, the 

 fifth large, with a deep oval excavation nearly the length of the seg- 

 ment, the apex of the segment deeply emarginate, with a slight lobe 

 in the emargination, the last dorsal narrowed at apex and truncate. 

 Ventrals of female normal. 



The style of coloration will enable this species to be known from 

 any other in our fauna. No striking variations have been observed. 



Occurs in California and Nevada. 



P. luperiua Lee, Proc. Acad. 1865, p. 207. — Form slightly more robust 

 than viridipennis ; head and thorax black, shining; elytra blue or slightly 

 greenish. Antennae piceous externally, the basal five joints yellow. Head 

 black, sparsely punctate, front yellow. Thorax wider than long, sides nearly 

 straight and slightly convergent to base, surface sparsely finely punctate, and on 

 each side a fovea, these sometimes united by a vague transverse depression ; 

 surface sparsely, finely and indistinctly punctate. Body beneath entirely black. 

 Legs yellow, tips of tibiae and tarsi slightly darker. Length .20— .26 inch. ; 5— 

 6.5 mm. 



In the male the ventral segments 2-3-4 are gradually shorter, the 

 fifth large and with a large and deep oval excavation, the apex of 

 the segment emarginate, with a feeble median lobe, the last dorsal is 

 truncate and slightly emarginate. The ventrals of the female are 

 of normal structure. 



Occurs in California south of San Francisco ; at San Mateo and 

 Santa Barbara. 



TEANS. AM. ENT. SOC. XX. JUNE, 1893. 



