IXll MONTHLY PROCEEDINGS 



triangular dilatation near the base of the claw. The third joint of 

 the antennge is also elongated. 



Eubria does not occur in our fauna, but all European authors a<>jree 

 in its having simple claws. This is not true. The anterior claw on 

 each pair of legs is bifid at tip while the posterior is simple. The 

 female was not seen. 



Dicranopselaphus Edwanhii Lee, forms a new genus, differing 

 remarkably from all Dasci/Uidse in having the claws furnished with 

 a long membranous appendage arising from the base, and a distinct 

 onychium. The genus was called Placonycha. 



Mr. McCook exhibited an artificial formicary containing livino* 

 specimens of the Honey Ant, M/p-mccocystus mexicaiim Wesmael. 

 They were brought from the Garden of the Grods in Colorado, where 

 they were first discovered by him. They had not been observed 

 heretofore north of New Mexico. A specimen of the exterior archi- 

 tecture, and portions of the interior were also shown. The nests are 

 gravel covered moundlets in shape of a truncated cone, about three 

 inches high, six to ten inches in diameter at the base, and about two 

 in diameter at the top. The centre is pierced perpendicularly by a 

 tubular gallery about one inch wide and three to six inches deep. 

 From the end of this other galleries branch out, in one direction 

 chiefly. One nest opened was followed seven feet, ten inches, through 

 the red sandstone at a depth of two to three feet beneath the sur- 

 face. Honey chambers of various sizes, some six inches long by three 

 wide, and three and one-fourth inches high were found, in each of 

 which about thirty honey-bearers hung. They clung to the roof by 

 their feet, the globular abdomen, filled with amber honey, drooping 

 down. The ants are nocturnal in habits, and collected honey from 

 galls upon the scrub oak {Querent radiata). They left the nest in 

 column about 7.30 p.m. after sundown, and returned from 11.30 P.M. 

 to 3.30 A.M., laden with the sweet exudations from the galls, which 

 quite distended their abdomens. Mr. McCook succeeded in making 

 quite complete studies of the habits and architecture of these inter- 

 esting insects, which have until now been entirely unknown His 

 field studies, it is hoped, will be supplemented by important observa- 

 tions upon the living specimens which he brought with him in large 

 numbers. 



He also made extended observations of the habits and architecture 

 of Poyonomjjmcx occtdtatalis Cresson. This large red ant makes the 

 conical mounds (usually gravel covered), which form one of the most 



