lo AGRICULTURAL EXPERIMENT STATION. 



including in the survey the Great Piece Meadows. Late in the 

 season he was transferred to New Brunswick and, throughout 

 the winter worked as Laboratory assistant in arranging and 

 classifying the immense mass of material that had been gathered 

 during the summer. It was also his task to prepare the speci- 

 mens for microscopic study and to make many of the drawings 

 which illustrate this report. During the summer of 1904, his 

 work in the Laboratory was continued, and he had the general 

 supervision of the breeding jars and material that was brought 

 in for study. His field assignments were for special collections 

 to complete our knowledge of species yet imperfectly known. In 

 the preparation of the present report Mr. Grossbeck is responsible 

 for the descriptions of the larvae and adults, the details of which 

 he also illustrates with each species. Altogether the work owes 

 much of its completeness to his care and patient accuracy. 



Throughout the work I have had the co-operation of Mr. 

 William P. Seal, of Delair, New Jersey; most of the time as a 

 volunteer, during the summer of 1903 as a member of the staff 

 especially intrusted with the questions concerning the relations 

 of fish to moscjuito larvae. Incidentally also, the value of polly- 

 wogs of both toads and frogs was determined experimentally 

 and collections of all sorts of aquatic creatures were made. Mr. 

 Seal has had a large practical experience in fish culture with the 

 United States Fish Commission and as a collector, hence his 

 contributions to the work have been of great value. He was 

 one of the first to insist that some mosquitoes at least must lay 

 their eggs in damp depressions to account reasonably for the 

 appearance of wrigglers so soon after they become filled. 



During the summer of 1903, Messrs. Charles W. Wagner, of 

 Elizabeth, and John Mellor. of New York City, students in the 

 Engineering course at Rutgers College, were sent into the field 

 to study the questions connected with salt marsh drainage and the 

 available methods of dealing with the breeding places of the 

 salt marsh species. Their work began in the meadows at the 

 mouth of the Raritan River, for which a complete scheme of 

 drainage was prepared. The conditions along the Barnegat 

 shore from Point Pleasant to the New Inlet at Great Bay were 

 carefully studied, and at Beach Haven a scheme for drainage to 

 relieve local conditions was laid out and its carrying out was 

 supervised so far as the work was done. Thereafter these gentle- 

 men joined Mr. Viereck at Cape May and, acting on his inform- 

 ation as to breeding places, worked out a practical and inexpens- 

 ive scheme for bettering conditions there. The report on the 

 latter place makes interesting reading and places into the hands 



