74 Bulletin American Museum of Natural History [Vol. XLII 



of all the tubercles and together they form two longitudinal rows, especially distinct 

 in freshly molted larva?. The three pairs of lateral tubercles on each segment are very 

 prominent. The sternites possess three folds and the ventral side of the interseg- 

 mental membrane one. The seta? on the anterior margin of the pronotum are sparser, 

 about fifteen on each side of the median line, but longer, more prominent. Legs not 

 visible from above. Dorsal plate of eighth segment slightly lobed medially at its 

 caudal margin. Head, dorsally, 0.35 mm. long and 0.43 mm. wide; retractile as 

 far as the ocular areas. Ligula longer than the second segment of the palpus. A 

 transverse row of ten stout, dorsal setse noted on the mentum nearly through the 

 middle and directed forward; the inner two setse seem to be on the epipharynx, 

 which bears short and stout setse. 



Paracymus Thomson {ex parte Cryniphilus) 



As suggested under Ancsena, this genus is very closely allied to that 

 one. They were formerly united under Cryniphilus. The ready char- 

 acters which distinguish the single local species, subcupreus, from 

 Anccena infuscata have been given under that genus. Zambeu found the 

 pupa of Paracymus ceneus beneath a stone near water but his descrip- 

 tion was very superficial. This is the only observation made upon the 

 life history of the genus, with the possible exception of the description 

 of Ancasna limbata, which may in reality belong to Paracymus. 



Paracymus subcupreus Say 

 Plate XVI 



The eggs are not enclosed in a case but only covered with scattered 

 threads of silk. Most of the egg-laying occurs in May but one egg-mass 

 was obtained indoors on April 20. The number deposited varied from 

 ten to fifteen, and the eggs usually hatched in about seven days. 



Two pupae were taken on July 19 from cells which were formed less 

 than an inch below the surface of the ground and two feet from the edge 

 of the water. The length of the pupal period was four days, as shown by 

 a larva which was reared in the aquarium. It transformed on September 

 12 at noon and emerged on the afternoon of the 16th. Another pupa, 

 collected on August 11 from a cell underneath a stone, came out on the 

 13th. 



The adult, upon emergence, was colored as follows: head brown, 

 with eyes darker; tips of the maxillary palpi almost black; antennal 

 clubs white; thorax and scutellum brown but lighter than the head; 

 legs light brown; elytra white except light brown margins along the 

 median line; under side of abdomen white. 



