22 BULLETIN OF THE BROOKLYN ENT. *"'. . 



Chlaenius laticollis, Say. 



" leucoscelis, QJievr. 

 Cicindela 12 guttata, Dej. 

 " repanda, Dej. 



A description will be given in following- numbers. 



DYTISCIDiS. 



The larva? of this genus have also two claws on their feet, the 

 legs being covered with swim-hair. 



The head is above slightly convex and beneath flat, narrowed at 

 the base ; they have six ocelli ; the mouth fitted for sucking, the 

 mandibles have an oblong opening at tip. Antennae are four- 

 jointed, but in full grown larvae they have laterally inserted joints, 

 so that the number of joints is eleven. 



They have one ventral segment less than those of the Carabidae 

 viz. only eight, and eight stigmata, the last being situated at the 

 tip of the eighth segment near the anus ; the first beneath the me- 

 sothoracic segment. The ventral segment is very elongate and 

 also provided with swim-hairs. 



They live in water, but pupate upon the shore and need more 

 than one year for their transformation. 



As far as I know no larva of any N. A. species of this family 

 has yet been described. 



The larvae have the feet with two claws and the abdominal seg- 

 ments with lateral processes (branchiae). Head very small, oblong, 

 fiat, antennae four-jointed, six eyes on a black spot, nine abdomin- 

 al segments, and four hooks on the prominent anus. 



The Gyrinus are said to depose their eggs on water-plants, the 

 larvae appear eight days later, at the beginning of August, the 

 full grown larvae leave the water and make a gray paper-like co- 

 coon under the bark of old willow trees etc., and the imago de- 

 velops one month after pupating. 



(To be continued.) 



Dorcus paralellus, was captured in 10 specimens, while boring their way 

 out of a sugar-maple. 



In a large stump of hard wood I found over 100 larvae of Orthosoma brunne- 

 tmi, Frost, of different sizes. 



