inhabiting Salt Water. 231 



me in great abundance at low-water mark in Salem harbour, 

 and also a species of marine mite. 



With the ho^ie of awakening an interest among biologists 

 in the subject of brine-inhabiting insects, and of receiving 

 further collections, especially from the salt lakes and salt- 

 works of this country, the following notes are published. 



Collection from Clear Lake. 



In the collection made in Clear Lake by Prof. Torrey, be- 

 sides the lialophilous larvaj and pupge of Tanypus and Ejyhydra^ 

 were a number of bees, ichneumons, ants, and a species of 

 Culex^ the latter very abundant in the male sex, with several 

 Muscids and Tipuloi ; also a species of Chrysopa and two spe- 

 cies of Coleoptera*, one a Stenus and the other Diahrotica 

 soror, Lee, all of which were probably drowned from having 

 accidentally fallen into the lake. In the collection, however, 

 two truly aquatic beetles occurred, one [Laccophilus decipiens^ 

 Lee.) a Dytiscidan insect, and the other [Berosus punctatissi- 

 mus^ Lee.) a member of the family Hydrophilidee. These 

 probably lived in the brine not only in the adult, but also in 

 the larval state. 



Salda interstitialis, Say, also occurred, and two other 

 aquatic Hemiptera,'a new species of HyqrotrecJms and a Corixaj 

 which are described by Mr. Uhler further on. 



Tanypusj sp. — The larv» and pupse of a species of Tanypus 

 (or closely allied genus or subgenus) were abundant at Clear 

 Lake. The body of the larva is long, slender, cylindrical, 

 gradually tapering toward each end. The head is long and 

 narrow, half as long as wide, and one half as long as the pro- 

 thoracic segment. There are no rudiments of antennae or 

 maxillary palpi to be seen. In this respect it agrees with a 

 species observed in fresh water at Salem, Mass. The mandi- 

 bles are long and slender, with the ends very slender, acute, 

 simple, untoothed, and well curved, forming two minute hooks 

 capable of being extended a considerable distance in front of 

 the head. The labium is broad and rounded in front, un- 

 toothed ; it is situated a little in advance of the middle of the 

 head, and is supported on a pair of slender chitinous pieces, 

 not very approximate, with the outer ends opposite the poste- 

 rior ocelli. The labrum is broad and rounded, overhanging 

 the mouth. There are two pairs of ocelli, situated a little be- 

 hind the middle of the head; the anterior pair are the smaller, 

 and touch the hinder pair. A few hairs are scattered over 



• The Coleoptera were obligingly determined by Dr. Horn, 



