6y6 



BULLETIN OP THE BUREAU OF FISHERIES. 



Verrill and Smith (1873, p. 540, 543) also list for local waters a larva which they refer to the genus 

 Eristalis, "found in Vineyard Sound, among algae inApril"; and another listed as "Molanna, species 

 undetermined," which was "found in a ... tube . . . attached to the piles of a wharf , below high- 

 water mark, at Menemsha Bight. ' ' 



The following is a list of the species of insects taken by Mr. E. D. Congdon in brackish water at Great 

 Pond and Tashmoo Pond, July and August, 1907. While these insects are not strictly marine in their 

 habitat, it seems worth while to include this list in the present work. The species were identified by 

 Messrs. Banks, demons, Currie, Heidemann, and Schwartz, of the United States National Museum. 



NEUROPTERA. 

 Limnophilidx sp., larva. Tashmoo, Great Pond. 



ODONATA. 



JEschna sp., larva. Great Pond. 

 Anax junius (Drury), larva. Tashmoo. 

 Sympetrum sp., larva. Great Pond. 



HEMIPTERA. 



Corixa burmeisterii Fieber. Tashmoo. 



Corixa harrissii Uhler. Great Pond. 



Gerris marginatus Say. Tashmoo. 



Mesoveliasp. (probably JU. bisignata Uhler), nymph. 



Tashmoo. 

 Notonecta undulata Say. Tashmoo, Great Pond. 



COLEOPTERA. 



Acilius fraiernus Harris. Great Pond. 

 Berosus peregrinus Herbst. Tashmoo. 



Chernes oblongus Say. 



Verrill and Smith, 1873, p. 544, 331. 

 "Under stones near low- water mark at Woods 

 Hole . . . several specimens were found to- 



Bidessus discretus Sharp. Tashmoo. 

 Cnemidotus muticus Leconte. Great Pond. 

 Gyrinus sp., larvae. Tashmoo, Great Pond. 

 Haliplus nificollis De Geer. Tashmoo, Great 



Pond. 



Hydroporus sp., larvae. Tashmoo. 

 Laccophilus maculosus Germar. Great Pond. 

 Philhydrus perplexus Leconte. Tashmoo. 

 Tropisternus glaber Herbst. Great Pond. 

 Tropisternus nimbatus Say. Great Pond. 

 Tropisternus sp., larvae and egg cases. Tashmoo, 



Great Pond. 



DlPTERA. 



Ceratopogon sp., pupa. Tashmoo. 

 Chironomus sp., larvae. Tashmoo, Great Pond. 

 Culicidce sp . , larva . Tash moo . 

 Odontomyasp., larva. Tashmoo. 

 Tabanus sp., larva. Great Pond. 

 Tetanocera sp., larva. Tashmoo. 



Class ARACHNIDA. 



Chernes oblongus Continued. 



gether. "- Verrill and Smith. Juniper (But- 

 lers) Point. W. M. Wheeler, in Marine Bio- 

 logical Laboratory card catalogue. 



XIPHOSURA. 



Limulus polyphemus (Linnaeus). 



. Verrill and Smith, 1873, p. 580, 340; Bumpus, 

 1898; iSgSa; i8g8b. 



Common locally wherever physical conditions are 

 favorable, e. g. , in Woods Hole Harbor, Katama 

 Bay, Vineyard Haven, Menemsha Bight, West 

 Falmouth Harbor. This animal frequents 

 muddy and sandy shores and mud flats, below 

 low-water mark, often burrowing a short dis- 

 tance below the surface. Occasionally 

 dredged by the Survey, even at a depth of sev- 

 eral fathoms; in one case recorded from i2> 

 fathoms, though it it is not certain that this 

 was a living specimen. 



Fish Hawk stations: 7633 (i living), 7779, 7780 

 (2 large). 



Phalarope stations: 138 (i dead), 140 (i dead), 



Limulus polyphemus Continued. 

 Limulus disappears through the winter, reap- 

 pearing in the spring. Bumpus reports the 

 taking of one at Waquoit as early as March 25 

 (1898); and Mr. Edwards reports that they 

 first appeared in Narragansett Bay, at about 

 the same day of the month in 1909. They 

 begin to spawn in May, at which time they 

 come to shore in great numbers, and are easily 

 taken. A limited area at the head of Great 

 Harbor has for years been a much frequented 

 breeding ground. The spawning season seems 

 to continue actively throughout part of June; 

 and I. A. Field has observed paired individ- 

 uals at Menemsha Bight as late as July 17. The 

 eggs are deposited in the sand, a short distance 

 below the surface. Young from one-half inch 

 to 2 or 3 inches long are found during the mid- 

 dle of August, and small tests are sometimes 

 exceedingly abundant on the beaches. 



