18 BULLETIN OF THE liliOOKLYN ENT. SOC. 



Mention bidentate ; the ligula narrower at base, gradually broad- 

 ening toward the tip, the median apex terminating with two bristles; 

 palpi two-jointed, equal in length, first joint club-shaped, rather stout, 

 second joint narrow, cylindrical, and with an area of sensitive aciculi 

 around the free tip. 



Prothorax a little wider than the head, slightly longer than broad, 

 equally broad at base and apex ; sides parallel. 



Mesothorax transverse, slightly shorter than the prothorax, but of 

 equal breadth ; sides somewhat arcuate, tergal scute sub-quadrate, 

 with rounded angles. 



Metaihorax similar to the preceding, but tergal scute considerably 

 shorter. 



Abdomen. Tergal scutes of the first eight segments elevated, 

 much shorter than broad, with posterior angles ending with a bristle, 

 anteriorly rounded off at the sides ; ninth segment resembling a 

 tubular annulate appendage, beset with short, stiff bristles; above 

 the tubus are two laterally inserted, thin appendages, 9 mm. long. 



Legs gradually longer from the first to the third pair; coxa prom- 

 inent, conical ; femur of anterior pair scarcely longer than trochan- 

 ter. Tibia as long as trochanter, with an area of spinules. Two 

 equal claws arise from the slender tarsal piece. 



Spiracles, nine pairs. The anterior and largest circular spiracle 

 is under the fold near posterior angle of prothorax ; the second, 

 much smaller, sub-orbicular at the posterior angle of metathorax ; 

 the other spiracles are in the sides of the abdominal segments 1 to 7 

 respectively near the anterior angle. 



March 5. I found five larvae of Chlsenius sericeus. Four died 

 from March 12th to 16th ; the remaining full-grown larva seemed, 

 April 16th, to pupate, but a few days afterward it became covered 

 with white pupse and died. The pup* developed, and proved to be 

 Iehneumonids. 



April 1. Several species of Chlsenius laticollis, Say, were brought 

 into the breeding-cage. Beginning of June they copulated in day- 

 time and laid eggs in the ground. 



June 23. I found ten larva?, 10 mm. long ; anal fork of the same 

 length, always erected upward ; very lively, fed very eagerly on mag- 

 gots of some flies. All died except three, which I had to take with 

 me into the country. Two died July 2 ; the third pupated July 

 21, after remaining nearly motionless for over a week. The pupa is 

 very peculiar. Remained in pupa state 7 days. 



F. G. Sciiaupp. 



