GEORYSSIDAE. Hil 



Tril... HI.— LIIH^'IC'IIIM. 



Very small species, roiuul uu the luargin of watercourses, where 

 they burrow in tlic grountl, and emerge when the water is thrown 

 on the banks. A faint clypeal suture divides the front, but, owing 

 to the dense punctuation, is frequently scarcely visible; the labruni 

 is distinct; the antennae, inserted at the sides of the front, are 

 only 10-j(jinted, and the three outer joints form a club, almost 

 solid in IMiysemus, feebly defined in Linuiichus. The head is 

 strongly retracted in both genera; the tarsi are free. 



Eyes, labruni, and manrlililo.s concealed in repose. Limnichus. 



Eyes, labruin, and mandibles free ; club of antennije received in cavities ,it 

 the anterior angles of tlie thorax, on tlu* upper surface. 



Bothriophoriis. 



The second genus is represented by a ver}' small species from 

 southern California, described as rhy.^emus viinutus Lee. 



Sub-Family III.—CHELONAKIIX.E. 



This sub-family is represented in our fauna by a single species 

 of Chelonariuni. The tropical species are found on leaves of 

 plants. They are elongate, oval, moderately convex insects, with 

 the thorax strongly margined on the sides and front; the head 

 retracted flatly upon the breast, leaving, however, the eyes, man- 

 dibles, and labrum visible; the antennas are inserted u\um the 

 front, closely approxinmted, 11-jointcd, filiform; epislonui not 

 separate from the front. Legs very contractile ; tarsi with the 

 third joint lobed; claws dilated at base. Epipleuno vciy narrow, 

 extending to the apex, grooved to fit the margin of the body. 



It might perhaps be properly considered as a distinct family, 

 l)ut its affinities with the Byrrhidse are none the less evident; 

 though it is a transition form to the Hclodini, below described. 



Fam. XXXVL— georyssidae. 



Mcntnm quadrate, corneous, moderately large; ligula 

 coriaceous, slightly bilobed. 



Maxilla; with two unarmed lobes. 



Antcnnie inserted under the sides of the front, near the 

 11 



