OP ARTS AND SCIENCES. 143 



23 mm. or more ; of abdominal appendages, 1.25 mm. ; breadth of 

 same, 0.3 mm. 



Florissant, No. 6010. 



EUTERMES Heer. 



The remaining species fall into the division of Termitina in which 

 the scapular vein is unbranched, and it is uncertain whether they 

 should fall in Termes proper or in Eutermes, the veins below the 

 scapular being in all cases poorly preserved or wholly obliterated. 

 The limited number of antennal joints in such as have these preserved 

 sufficiently for examination, and the occasional indication of a broad 

 subscapular field in others, leads rather to the presumption that they 

 should be placed in Eutermes. Two species have been found at 

 Florissant. The genus has been well known in a fossil state, four 

 species having been described from Radoboj in Croatia, and five from 

 Prussian amber. Indeed, the genus was first founded upon fossil 

 species, but it was soon seen that many living forms belonged to the 

 same group. The existing species, some thirty in number, belong 

 almost exclusively to the tropics, and especially to those of the south- 

 ern hemisphere. 



The two species of Eutermes which have been found at Florissant 

 may be separated by the following features : — 



Head broader lieliind than in front, scarcely half as long again as broad. 



Proiiotuni semicircular, the posterior curve uniform. ... 1. E.Jossarum. 

 Head not broader behind than in front, fully half as long again as broad. 



Pronotum very short, the hind margin more or less truncate. 2. E. Meadii. 



Eutermes fossauum nov. sp. 



Head very regularly obovate, a little broader behind than in front, 

 nearly half as long again as broad, its posterior border well rounded. 

 Eyes rather small, situated in the middle laterally, projecting but 

 little. Antenno3 scarcely if any longer than the head, rather stout, 

 enlarging away from the base, composed apparently of less than fif- 

 teen joints. 



Pronotum as broad as the head and twice as broad as long, serai- 

 circular, the front border scarcely concave, the front margins slightly 

 rounded. Meso- and metanotum as broad as pronotum, quadrate, 

 equal, about half as broad again as long. 



Abdomen somewhat longer than the rest of the body, and slightly 



