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VOL. III. BROOKLYN, AUGUST, 1880. No. 4. 



Biological Notes on the Larva of Chlsenius 

 leucoscelis, Chew. 



Several larvae were found, August 8th, in a very wet place on the 

 banks of the North Branch of the Callicoon River, under stones near 

 the edge of the water. Six of them were so small that I took them 

 for larvae of Bembidium, but in one week they had grown very rap- 

 idly. In the same locality there were found only species of the 

 above Chlaenius and of Patrobus rugicollis, so I guessed that they 

 must be the larvae of one of these two species. 



On August 14th, one of the larger larvae moulted, the whole being 

 entirely white ; after two hours, the head became pale yellow and the 

 abdomen gray (steel-blue). On the 15th it was fully colored. On 

 September 4th it pupated, and on the 7th the eyes became black 

 and the mandibles brown. On September 11th, at G.15 a. m., it 

 developed. 



On the evening of September 11th, the head became green gold, 

 thorax dark brown, elytra light brown, legs and antennae rufous. 

 September 12th, at 7 a. m., head and thorax were green gold, elytra 

 dark, brown greenish, but not yet fully colored. On September 

 14th, a. m., it was fully colored. 



From twenty-four specimens, only a single one brought to devel- 

 opment ; all the others died. 



There were in the neighborhood of the larva some large dipterous 

 larvae, perhaps that of a Sialis, living in the wet sand. I procured 

 some, but, as they were much rarer or more difficult to obtain, I 

 ascribed the loss of the other larvae to the want of appropriate food. 



