54 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. 



row broad; saw-guides convex above, and broadly convexly 

 rounded below and at apex to a blunt point; body black, 

 with a line on collar, apex of front and middle femora, 

 their tibiae, and basal third of hind tibiae, white. Length 

 6 mm evecta 



22. Clypeus broadly, shallowly emarginate 23 



Clypeus narrowly, deeply emarginate, with a small median 



tooth and carina, lobes broadly angular; median fovea 

 of moderate size, with perpendicular sides, except in front, 

 strongly flaring; a triangular-shaped pit in front of median 

 ocellus; ocellar furrow fine, interocellar furrow broad; 

 saw-guides straight above, straight below, and converging 

 to apex, apex with angles broadly rounded and square at 

 middle; body black, with clypeus, labrum, collar, tegulae, 

 and legs below knees, tibise and tarsi, more or less infus- 

 cated, white. Length 6 mm candidula 



23. Postocellar area longitudinally carinate at middle; clypeus 



broadly emarginate; ocellar furrow faint or wanting, inter- 

 ocellar furrow distinct; third segment of antennae nearly 

 as long as fourth and fifth together; saw-guides convex 

 above and below, convexly and slightly obliquely trun- 

 cately rounded at apex; body black, with clypeus, labrum, 

 collar, tegulse, front and middle legs below coxae, femora 

 more or less infuscated, hind trochanters, and a ring on 



the base of hind tibiae, white. Length 6 mm canora 



Postocellar area flat, not carinate at middle 24 



24. Clypeus angularly emarginate with lobes angular; median 



fovea a pin-hole pit; ocellar and interocellar furrows 

 faint; third segment of antennae longer than fourth; saw- 

 guides convex above and oblique below„roundly truncated 

 at apex; body black, with clypeus, labrum, collar, tegulae, 

 front and middle trochanters, and hind tibiae and tarsi, 



white. Length 6 mm cauta 



Clypeus roundly emarginate with lobes broadly rounde^d at 

 apex; median fovea a pin-hole pit; ocellar furrow faint, in- 

 terocellar furrow distinct; third segment of antennae 

 slightly longer than fourth; saw-guides straight above, 

 convex below, truncately rounded at apex; body black, 

 with clypeus, labrum, collar, tegulae, front and middle legs 

 below coxae, hind trochanters, apd basal third of hind tibiae, 

 white. Length 7 mm cariosa 



°E. cavata MacGillivray. 

 °E. cailosa MacGillivray. 

 °E. caetrata MacGillivray. 

 °E. celsa MacGillivray. 



