COLEOPTERA. 395 



joints, and the epistoma is entire, or on the anterior margin slightly 

 concave. 



A species transmitted to us by our friend Doctor Leach presents 

 such singular characters that we have been induced to consider the 

 Insect as the type of a new subgenus(l) the 



Globaria, Lat. 



So named because its body is almost spherical and laterally com- 

 pressed, and because it appears susceptible of forming a ball, like an 

 Agathidium. Its antennae appear to me to be composed of but eight 

 joints, of which the fifth is dilated into a spine at the internal side, 

 the sixth forms a reversed and elongated cone, the seventh cylin- 

 drical, and the last or the eighth conical; these latter joints form an 

 almost cylindrical and greatly elongated club, which terminates in 

 a point. The maxillary palpi are a little shorter than the antennae. 

 The eyes are large and prominent. The thorax is almost semilunar. 

 The elytra completely clasp the abdomen. The pectus is destitute 

 ■of a sternal spine. The extremity of the four posterior tibiae is fur- 

 nished with a bundle of setae almost as long as the tarsus. The scu- 

 tellum is small, triangular, elongated, and narrow. 



The only species known, G. Leachii, is small, and foreign to 

 Europe. I believe it is from South America. 



All the remaining Hydrophilii have nine joints in their antenna; 

 the club is oval or ovoid. The body is not susceptible of being con- 

 tracted into a ball. 



In the largest species, the two intermediate joints of the antennal 

 club, or the seventh and eighth, are rcniform or irregularly lu- 

 nate, obtuse at one end, prolonged, arcuated, and pointed at the 

 other, with a remarkable space between them; the first of this club 

 is cupulate and most prolonged anteriorly. The middle of the ster- 

 num is elevated into a carina, and terminated posteriorly in a point 

 more or less long, and very acute. The maxillary palpi are longer 

 than the antennae; their last joint is shorter than the penultimate. 

 The tarsi, particularly the last, are compressed, fringed with hairs 

 or cilia along their internal side, and terminated by two hooks, ge- 



Bourdon, a French naturalist who is now exploring' Colombia, first discovered this 

 species in the vicinity of Paris. 



(1) It would seem to come more naturally near that of Berosus, Leachj but on 

 account of the number of tiie antennal segments, I think it best to place it di- 

 rectly after Spercheus. This order, however, might be reversed by commencing 

 with those subgenera which have nine joints in the antennae, and ending with 

 those in which there are three less, or with Globaria and Spercheus. 



