ON THE SERRICORNES. 363 



exactly like the phalenae. The Indians make use of them in 

 their nocturnal journeys, and attach them to their shoes. 

 The women also carry on their works by the light which they 

 emit. BroAvai adds, that they have the power of shining or 

 not at will, which is another affinity which they possess with 

 the lampyris. 



The other species (Elater phosphorus) is smaller than the 

 preceding, and is found at Cayenne and in Surinam. To 

 judge from analogy, we may suppose that the two spots 

 which this insect has upon the corslet, send forth the same 

 luminous brilliancy as in the first species. They both resem- 

 ble each other very much. 



We add two new species of Elater, viz., lusciosus, 

 Hope's MSS. This insect is somewhat like Elater 

 occulatus, of Fabr., but it is much broader, more convex, 

 and more robust ; it is black, with two black velvety eyes 

 on the thorax, of which the irides are white. The body 

 cretaceous, irregularly spotted, beneath black, spotted with 

 white. This insect is from Mexico, and is nineteen lines in 

 length. The other species is E. aureolus. This is like 

 auratus, of Druri/. It has the antennas black, filiform, 

 compressed, and subserrate ; the thorax broad, depressed, of 

 a rose green colour, with the sides elevated, and green. The 

 elytra of a rich bronzed green, shining with fine punctated 

 striae ; the tip acute ; this is from the Tanesserim coast, 

 and is seventeen lines in length. 



After Galba, of Latreille, M. Guerin, has added a new 

 genus named Pterotarsus. The antennae have the first joint 

 large, oval, the others very small, and with the last eight 

 joints strongly pectinated ; the pectinations are much longer 

 than those of Galba. The head and antennae, when in repose, 

 are perfectly hidden in the thorax ; the thorax is oblong glo- 

 bose ; the elytra convex, rounded. 



There are four species of the genus. The one his trio, of 



