164 BULLETIN 108, UNITED STATES NATIONAL MUSEUM. 



removed to a rearing cage, at the time the winged adults were ready 

 to swarm. On August 20 reproductive individuals of the second 

 form were appearing. These forms had the characteristic pale 

 yellow pigmentation. 



The young colonies are of small size and the rate of increase is but 

 slow. Colonies have been reared as in case oijlavipes (Snyder, 1915) 

 and the development of the young observed. 



On May 18, 1915, at Falls Church, Virginia, mature nymphs of the first form and 

 those in quiescent stages, also sexual adults attaining wings and mature pigmenta- 

 tion, were placed in rearing. 



June 5, 1915. Sexual adults swarmed. 



Jime 25, 1915. First eggs in royal cells in wood. 



Middle July, 1915. Egg laying completed. 



August 4, 1915. Eggs not yet all hatched, nymphs in various stages of development. 

 Abdomens of queens not markedly distended; males in royal cells with females. 



December 3, 1915. Workers and soldiers attaining maturity. 



January 8, 1916. Same. 



February 9, 1916. Workers and soldiers nearly mature; workers, 3 mm. in length; 

 soldiers, 4 mm. in length. Eggs in clusters in galleries over 1 dozen. Eggs f mm. 

 in length and nearly ^ mm. in width; vary in size. Many workers with mutilated 

 antennae. Reproductive forms active; antennae mutilated with abdomens of queens 

 not markedly distended or the segments as yet separated. 



February 17, 1916. Eggs as yet imhatched since February 9, '16. No recently hatched 

 nymphs; only about one-half dozen eggs observed. 



March 2, 1916. Two recently hatched nymphs and six unhatched eggs in nest; eggs 

 in cluster and active young nymphs near eggs. 



March 15, 1916. Two imhatched eggs and two recently hatched young observed in 

 nest; nymphs near eggs. 



April 5, 1916. Eggs all hatched; nymphs in various stages from recently hatched to 

 twice this size, workers 3^ mm., soldiers 4^ mm.; workers and soldiers 13 segments 

 to antennae; mature. 



June 6, 1916. Worker 3^ mm. in length, mature; soldier 3^ mm. in length. 



References to biological or economic literature. 



1915. Snydeu, T. E. Bur. Ent. Bull. 94, pt. 2, U. S. Dept. Agric, pp. 13-85, Feb. 17. 



1916. Snyder, T. E. Bull. 333, U. S. Dept. Agric, pp. 1-32, Feb. 16. 



1916a. Snyder, T. E. Farmers' Bull. U. S. Dept. Agric. No. 759, pp. 1-20, Oct. 9. 



1916. Thompson, C. B. Joum. Compar. Neurology, vol. 26, No. 5, Oct. 



1917. Thompson, C. B. Joum. Morph., vol. 30, No. 1, Dec. 



1919. Thompson, C. B., and Snyder, T. E. Biol. Bull., vol. 36, No. 2, pp. 115-132. 

 1919. Thompson, C. B. Biol. Bull., vol. 36, No. 6, pp. 379-398, June. 



RETICULrrERMES HAGENI Banks. 



For taxonomy see pp. 44-45. 



It seems rather strange and unusual that a new species of termite 

 should be found occurring in the District of Columbia and its vicinity 

 at this late date. Yet this is the second new species since 1907, 

 when Mr. Banks described R. virginicus from Virginia and the Dis- 

 trict of Columbia. R. Jiageni is similar to virginicus but is of a pale 

 bro%vn color and swarms later in the season. It was named in honor 

 of the distinguished entomologist, Dr. H. Hagen. 



