48 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



lar, and all the legs beyond the apical third of femora, 

 white; apex of posterior tibiae and tarsi infuscated; frontal 

 ridge wanting, and median fovea and ocellar basin con- 

 tinuous; third segment of antennae as long as fourth and 



fifth together. Length 6 mm atra 



Antennal furrow below lateral ocelli narrow, with sharp 

 walls, and impunctate; body black, with tegulae, a narrow 

 margin to pronotum, front and middle legs beyond basal 

 fourth of femora, and posterior legs beyond knees, white; 

 second segment of antennae about as long as first, third 

 about equal to fourth and fifth together; frontal ridge 

 wanting, median fovea and ocellar basins continuous. 



Length 8 mm nortoni 



3. Femora black except at apex; body black, with a rufous spot 

 covering .the collar and mesonotum; tegulae and legs be- 

 yond the apical third of the femora, white; third seg- 

 ment of the antennae as long as fourth and fifth together; 

 frontal ridge distinct and unbroken, median fovea and 

 ocellar basin therefore not continuous; median fovea as 

 large as or larger than the ocellar basin and extending 

 through the supraclypeal area; triangular depression be- 

 hind median ocellus not extending to the antennal furrow. 



Length 7 mm daeckei 



Femora white; body black, with a rufous spot covering the 

 greater part of prothorax and mesonotum; third segment 

 of antennae hardly as long as fourth and fifth together; 

 frontal ridge distinct and unbroken; median fovea long and 

 distinct; ocellar basin almost wanting; triangular depression 

 behind median ocellus distinct and extending to the 

 antennal furrow. Length 7 mm collaris 



C P. atra MacGillivray. 



P. nortoni MacGillivray. 

 P. daeckei MacGillivray. 



P. collaris MacGillivray. 



c 



o 



Empria LePeletier. 



Key to Species. 



Clypeus uniformly flat or convex 2 



Clypeus with a median longitudinal ridge or carina, fre- 

 quently minute 6 



Antennal furrows broadly rounded depressions, continuous 

 from the antennal fovea to the lateral ocelli; ocellar basin a 

 broadly depressed area from near the antennae to the 

 median ocellus; median fovea a minute pit; ocellar and 



