inhabiting Salt Water. 231 



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

 and also a species of marine mite. 



^ With the hope of awakening an interest among biologists 

 in the sub)ect_ 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 halophilous larvaj and pupa3 of Tanyjms and Ephydra, 

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

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

 Muscids and Tqmlw; also a species of Chr^sojm and two spe- 

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

 sorer I^ec., all of which were probably drowned from having 

 accidentally fallen into the lake. In the collection, howevei% 

 two truly aquatic beetles occurred, one {LaccojMus clecipiens\ 

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

 miis Lee.) a member of the family HydrophilidjE. These 

 probably lived m 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 oi Hygrotrechus and a Gorixa, 

 which are described by Mr. Uhler further on 



Tamjpus, sp.— The larvae and pupa3 of a species of Tanypus 

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

 Lake. Ihe body of the larva is long, slender, cylincbical, 

 gradually tapering toward each end. The head is lon^ and 

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

 thoracic segment. There are no rudiments of antennje or 

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

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

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

 simple, untoothed, and well cmwed, forming two minute liooks 

 capable of being extended a considerable distance in front of 

 tne liead._ Ihe labium is broad and rounded in front un- 

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

 fiead, and is supported on a pair of slender cliitinous pieces 

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

 rior ocel 1. 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 ove^ 



* The Coleoptera were obligingly determined bv Dr. Horn. 



