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



on posterior margin of mesopleuras, a line on the posterior 

 margin of the abdominal segments, broadest on the venter, and 

 the legs, brownish white; a band on posterior margin of each 

 lobe of mesonotum, the scutellum, and the median tergal ab- 

 dominal segments more or less, rufous; saw-guides con- 

 cave above, and convex below, broadly rounded at apex to 



a point above ; wings hyaline. Length 6 mm atratum 



Pleurae rufous; body black, with clypeus, labrum, mandibles 

 in great part, collar broadly, tegulse, legs, and abdomen 

 beyond basal plates in great part, luteous, sometimes suf- 

 fused with rufous; lobes of mesonotum except a black 

 spot on center of each, scutellum, and pleurae, rufous; 

 saw-guides slightly concave above, and convexly rounded 

 from the base to a point at apex above ; wings hyaline. Length 

 6 mm murtfeldtiae 



°I. dilutum (Cresson). Monophadnus dilutus Cresson. Larva 

 feeds on Quercus alba and Quercus prinus. 



°I. rileyi (Cresson). Selandria rileyi Cresson. Monophadnus 

 rileyi Cresson. 



°I. caryicola Dyar. Larva feeds on pig-nut hickory. 



°I. infrequens Dyar. Larva feeds on Quercus alba. 

 I. atratum MacGillivray. Southington, 27 April, 191 1 (W. 

 E. B.). 



°I. murtfeldtiae Dyar. Larva feeds on black oak. 



Periclista Konow. 

 Key to Species. 



1. Pleurae more or less rufous 2 



Pleurae wholly black 4 



2. Fourth segment of antennae distinctly longer than fifth; front 



finely punctate 3 



Fourth segment of antennas equal to fifth; front finely stri- 

 ated; saw-guides with their upper margins straight, their 

 lower margins convex at base, concave and constricted into 

 a bhmt point at apex; body black, with clypeus, labrum, 

 collar broadly, tegulae, legs, metapleurae, venter of abdo- 

 men, and greater part of tergum except a band at 

 center, luteous or white; pleurae, a broad band on apex of 

 each lobe of mesonotum, and scutellum, rufous; wings 

 hyaline. Length 7 mm purpuridorsum 



3. Ocellar basin uniformly concave; ocellar furrow distinct; 



body black, with clypeus, labrum, collar broadly, tegulae. 



