June )I9 o 5 .j KNAB: INHABITANT OF SARRACENIA PURPUREA. 69 



Delaware Water Gap, N. J. (July 12, C. W. Johnson), and Kaslo, 

 British Columbia (June 11, H. G. Dyar). Two specimens, lype 

 No. 8383, U. S. National Museum. 



Ceroplatus terminalis, new species. 



Near clausus, but the wings are distinctly marked with dark gray toward their 

 apices the united portion of the third and fourth veins is longer than the succeeding 

 Icuon of the fourth vein, etc. Yellow, the antenn* an ocellar spot, a median 

 pair of lines on the mesonotum which diverge strongly anteriorly and are united 

 posteriorly, the knobs of the halteres and apices of the tarsi, brown. Antenna about 

 as long as the thorax, the last pint slightly longer than wide, the others wider than 

 ong Wings hyaline, tinged with yellow along the costa, the apices broadly and 

 hind margin from apex of axillary cell more narrowly bordered with dark gray, which 

 t considerably prolonged along the posterior branch of the fifth vein, a lighter gray 

 P o n apex of the first and of the second posterior cell, the gray color extends along 

 1 tl m/vein to a point a short distance basad its upper branch, the latter terminates 

 in the first vein a considerable distance before the apex, auxiliary crossvem s igh y 

 beyond the humeral, apex of auxiliary vein beyond the union of the third and fourth. 

 Length 10 mm. 



Kaslo British Columbia. A male specimen collected July 16 by 

 Mr. R. P. Currie. Type No. 8384, U. S. National Museum. 



A CHIRONOMID INHABITANT OF SARRACENIA 

 PURPUREA, METRIOCEMUS KNABI COQ. 



By Frederick Knab, 

 Urbana, III. 

 (Plate VI.) 



During the course of a season's work upon culicid larvae the writer 

 examined the liquid contents of many leaves of the pitcher-plant, 

 Sarracenia purpurea. It was found that the water in these leaves con- 

 tained, besides larvae and pupae of the mosquito Wyeomyia smtthtt 

 two other forms of dipterous larvae. One of these was a large maggot 

 of the brachycerous type, perhaps the larva of Riley's Sarcophaga sar- 

 racenia a species which he bred from the leaf contents of Sarracenia 

 variolaris * The other was a small, pale chironomid larva. 



The first material was collected on July 30, 1903. on the boggy 

 shores of a pond a few miles from Westfield, Massachusetts. Of the 

 pitcher-plant leaves examined none con^mt^more^^^o^^ 

 — — -^T^T Tr^cri^ tion" s^nT^^aTrrUtorT^two insects which brave the 

 dangers of Sarracenia variolaris. (Trans. Acad. Sci., St. Louis, 1874, v, 3, P- 

 235-240) . 



