BULLETIN OF THE BROOKLYN ENT SOC. 89 



Legs. The anterior leg has beneath the two claws two dull teeth. 

 Beside this I can see not much difference in the legs of any of the 

 earabideous larvae I have had under observation. 



A number of these larvae were found under cow-droppings, evi- 

 dently feeding on pupa? of Aphodins, which they sucked also in con- 

 finement. One found August 9th pupated August 26th, and devel- 

 oped September 5th ; another captured same day, August 9th, pu- 

 pated August 18th, and developed August 29th. They require after 

 the development two days to become of full color, first being light 

 brown. The first-mentioned species was kept after development for 

 some days in a round box feeding on veal, and once falling out of the 

 box ran around in small circles, as it had done all its lifetime before. 

 Custom of life ! ! 



2. Pterostichus mutus. S<n/. 



Larva very similar in general appearance to the preceding, but 

 differing as follows : Head longer than broad, the mandibles more 

 slender and acute, the cardinal piece of the maxillae has a distinct 

 tooth with two stout bristles below the insertion of the lobe, the sec- 

 ond and third joints of the palpi are nearly equal ; the ligula is in this 

 species longer than broad, while in lucublandus it is broader than 

 long ; the joints of labial palpi nearly equal in length and also in 

 thickness, while in lucublandus the basal joint is twice as long and 

 thick as the second ; basal joint of antennae lacking the inner tooth. 



Several larvae were found together with those of lucvhlandus under 

 the same circumstances. One found July 17th pupated August 1st, 

 developed August 8th ; another found July 21st pupated July 31st, 

 developed August 7th ; thorax, tibiae and tarsi became brown, while 

 the coxae and abdomen remained white. August 8th at (5 p. m. it was 

 of full color. 



. «». < t, »..*» 



EXPLANATION TO PLATE. 



A. Larva of Platymis extensicollis, Say. 

 !>. •• Chlti'iiius leucoscclis, Cher. 



('. •• rhl.Tiiius laticollis, Say. 



D. •• Pterostichus lucimlandus, Say. 



E. *• Pterostichus unit us, Say. 



F. •• Staphilinus ralpinus, Nordm. 



1. Head above. II. Head beneath. III. Antenna?. IV. Ligula. V. Max- 

 illa. VI. Mandible. VII. Front. E, E. Pupa of E. 



The descriptions oi A and F will be contained in the following number. 



