394 TRANSACTIONS OF THE [1897 



ridge ; two irregular lines of punctures on each side of the 

 front; fovea of the male small, shallow, bounded by 

 coarse punctures, bluntly oval above, extending upwards 

 about one-eighth the length of the eyes. Pronotum mod- 

 erately convex, coarsely rastrate, the transverse yellow 

 lines very slightly curved, each bordered by a fine 

 scratched line, the anterior margin defined by a slender 

 carinate line, the posterior margins yellow; the pectoral 

 pieces more or less clouded with *pale brown, xyphus 

 acute, of medium length, ivory-white, prosternal lobe 

 usually white, broad. Clavus minutely rastrate, marked 

 with long and wide, yellow, incomplete and forked or 

 sagittate lines at base, but with three series of almost 

 obliterated flecks running back towards tip, and another 

 series of minute lines touching the outer suture, sutural 

 lines yellow; corium obsoletely rastrate, marked with 

 forking lines of slender yellow flecks, which form three 

 series from behind the middle to the tip, inner subsutural 

 line marked with a continuous series of minute flecks; 

 costal area yellowish, almost obscured by a smoke-brown 

 streak which tapers posteriorly, the apex broadly yellow; 

 membrane very dark, marked with well separated, uneven 

 flecks, which are arranged in looped lines posteriorly. 

 Legs yellowish, the palas S hgulate, a little wider apic- 

 ally, the tip a little curved, but almost truncate, the upper 

 and lower border and bristles brown, tibia much shorter 

 than the pala, a little curved, palae of female oblong-ovate, 

 acute at tip, bordered with brown, and with brown bristles 

 on all the margins. Tergum black or dusky, bordered 

 with yellowish, venter dusky or black, with a pale border. 

 Length to tip of membrane 8 to 8)4 mm. Width of 

 pronotum 2 to 214^ mm. 



Common in the Coastal region. It occurs also in the 

 vicinity of Chicago. In shallow pools, heated by the 

 sun's rays, these insects are cooked of a red color. 



