250 ENTOMOLOGICAL NEWS. [June, '07 



inner side of each posterior tibia. Anterior legs somewhat shorter 

 and stouter than the others. All the femora more or less roughened 

 by encircling ridges ; all the tibiae constricted toward their bases ; 

 tarsi long, as broad at their apices as at their bases ; anterior and 

 posterior, especially the posterior, coxae thick and heavy. General 

 color of legs dark brown ; tibiae generally slightly lighter than the 

 femora; tarsi yellowish brown; the very bases of the middle femora 

 and all of the middle trochanters light translucent yellow. 



Abdomen at base considerably narrower than the pterothorax; 

 very elongate-ovate in general outline; widest at the fifth and sixth 

 segments; from the posterior border of the seventh segment tapering 

 rather abruptly to the base of the tenth segment; nearly three times 

 as long as broad; surface, when viewed by reflected light, strongly and 

 closely reticulated, both above and below; last two segments less 

 strongly reticulate. Abdomen very dark brown; first segment some- 

 times lighter; apical portion of the ninth segment and all of the tenth 

 segment always somewhat lighter than the remainder. The sides of 

 the eighth segment sharply dentate with rather coarse teeth on the 

 hind border and strongly produced posteriorly; the posterior margin 

 of the eighth dorsal segment drawn out in such a way as to form 

 comb-like teeth. Spines along sides and around tip of abdomen 

 mostly long, large and conspicuous; those on the ninth segment as 

 a rule larger and heavier than those on the tenth; those at the very 

 apical margin of the tenth small and inconspicuous. Protruding from 

 the apex of segment ten is a peculiar small globular semitransparent 

 organ which is tinged across the middle with brown and bears two 

 small inconspicuous spines. This organ is probably a part of the 

 sheath for the reception of the ovipositor when it is not in use. At- 

 tached to each side of the ventral apical margin of the tenth segment 

 is a peculiar flap-like process. These processes are present in other 

 species and are often found, in mounted specimens, strongly inclined 

 toward each other, over and beyond the ventral gap in segment ten 

 and it may be their function to assist as catches in holding the ovi- 

 positor in place. Both the globular organ and the flaps here described 

 are present, and under the high powers of the microscope appear 

 prominently, in all the specimens which I have. 



Described from five cotypes, two of which are deposited in 

 the collection of the United States National Museum, and 

 the remaining three in the collection of the Massachusetts 

 Agricultural College. 



Specimens captured in Bellamy River Swamps, Dover, N. 

 H., on flowers of Symplocarpus foetidus Salisb., April II, 

 1904, by Mr. J. C. Bridwell, through whose kindness I re- 

 ceived them and for whom I name the species. 



