IQ4 



- cond segment of antennae longer than either the third or fourth. 



Mi 

 BB. Second segment of air than either the third or fourth. 



I'll \NI A. 



Body elongate, more than four times as long as bi .m much 



r than broad. 



H Ante; r than head and j>n>m>tum together; the posterior tibiae 



and : ther much longer than the intermed 



LlMNOPORUS. 



Antennae shorter than the head and pronoun: r; the posterior 



tibiae and tarsi together but little longer than the intermediate tibiae. 

 C. First segment of antennae nearly equal in length to the fourth. 



Ll v [ 



CC. First segment of the antennae considerably longer than the fourth. 



Hi 



Closely allied to Step/id nia, and resembling it in the form of their 

 bodies, arc the species which constitute the genus Haldbatcs. Ti; 



:ruly pelagic insects, living on the surface of the ocean, often 

 hundreds of miles from land. They are most abundant in the region 

 of calms near the equator; they feed on the juices of dead animals 

 floating on the surface, and probably attach their eggs to floating 



weed ' Sargassuni). 



Family XX. LIMNOIJATID^.* 



The members of this family are very long, slender insects, with 

 linear legs and antennae. The head is nearly 

 cylindrical, and longer than the thorax; thi 



are round, projecting, and placed a little n 



the base than the tip of the head. These in 

 creep slowly upon the surface of the water: they 

 carry the body considerably elevated: and are 

 found mostly where plants are growing in quiet 

 de-light to remain at rest, with 

 perhaps a single claw hooked to some projecting 

 object. When disturbed, they move very slowly, 



and seem disposed to save themselves rather by 



concealment among rubbish or tangled growths 

 than bv movement^. The voting forms 



^-Limnobattt 3 * 



lender that they can only be det 

 with great difficulty in the places to which they report." (Thler.) 



* Limnobfttida, Limnobatcs: lintnc (Mm //i, a salt marsh; bates (/>'< t' r // : ,\ one that 

 treads. 



