124 INSECUTOR INSCITl/E MENSTRUUS 



at the crown, being tightly jammed at all times in the burrow. The bor- 

 ing is not more than 7 centimeters in length, and the wet situations in 

 which the food plant flourishes make the question of air supply important. 

 Thus the modified posterior spiracles show how this paiir have come to 

 meet a special function. 



Oligia includens Walker. 



Mature larva: Very cylindrical, colors dull, pale, purplish brown, 

 indistmct lines whitish as are the anterior and posterior joints ventrally, the 

 first four abdomiucil rings show fully darkened, giving the girdled appear- 

 ance of Papaipema, except that it is less pronounced ; head polished, 

 pale yellow, setae exceedingly minute, width 0.8 mm. ; cephalic plate pale, 

 same width, marked at side with black border ; anal plate less pro- 

 nounced ; a prominent tubercular plate precedes the spiracle on joint 1 ; 

 conventional tubercles very weak ; spiracles on joint 1 I slightly largest, 

 all black ; a thread-like dorsal and a similar, though double, subdorsal 

 line is continuously traceable ; length, 22 mm. ; width, 2 mm. Maturity 

 is reached June 5-12, after an estimated larval period of 20 days. 

 Moths emerge July 2-7 ; pupation is in the ground, and the pupa is 

 normal. Food plant, Carex stricta. 



This is found to be a very commonly diffused species when food plant 

 indications are followed. The concentrated appearance of the moths and 

 their short period of flight account for their paucity in collections, appar- 

 ently. A sexual divergence, and a variation more common to the female, 

 may explain the synonymical misconceptions. 



The two larvae herein treated seem in no way naturally associated. 



A NEW ANDRICUS FROM NEW JERSEY 



{Hymenoptera, Cynipidet) 

 By WILLIAM BEUTENMULLER 



Andricus flavohirtus, new species. 



Female : Head light brown, minutely punctate, face and cheeks 

 densely covered with silky yellowish hairs, eyes black. Antennae yellow- 

 ish brown, 1 3-jointed, third, fourth, fifth, and sixth joints longer than the 

 others and of equal length, following joints shorter and subequal, last joint 

 longer. Thorax light brown, finely punctate and covered with decum- 



