18 Harry Scott Smith : 
1896. Nysson rufiventris Fox, Journal of the New York Entomological 
Society, iv, p. 15. 
I have eleven specimens of this species from Glen, August 13 
to 21, 1906, taken on flowers of Cleome serrulata and Helianthus 
sp. 
Nysson simplicicornis Fox. 
1896. Nysson simplicicornis Fox, Journal of the New York Ento- 
mological Society, iv, p. 15. 
Two males from same locality and date as above, and which 
seem to be identical to rufiventris, excluding the color of the 
abdomen. 
Nysson plagiatus Cresson. 
1882. Nysson plagiatus Cresson, Transactions of the American Ento- 
mological Society, ix, p. 276. 
1896. Nysson plagiatus Fox, Journal of the New York Entomological 
Society, iv, p. 13. 
The largest Nyssonid; four specimens, both sexes, from West 
Point and Glen, June to August. 
Nysson aequalis Patton. 
1879. Nysson aequalis Patton, Canadian Entomologist, xi, p. 212. 
1896. Nysson aequalis Fox, Journal of the New York Entomological 
Society, iv, p. 18. 
A pair of this species was taken at West Point, June, 1887 (L. 
Bruner). 
Nysson angularis, n. sp. 
6. Length 7-8 mm. Black with yellow markings. Head with large 
well-separated punctures, clypeus sparsely punctured; front and clypeus 
clothed with a dense covering of yellowish white pubescence; mandibles 
dark rufous; antennae black, next to the last joint considerably larger than 
the last, and slightly produced beneath at apex. Prothorax with a few 
large shallow punctures, and covered with a dense coat of short, almost 
golden pubescence. Mesonotum, scutellum, and pleura coarsely punctured, 
the punctures on the pleura often confluent. Metathorax coarsely reticu- 
late, metathoracic spines with bright yellow tips; a-pubescent area just 
above each spine. Abdomen both dorsally and ventrally with strong, well- 
defined, well-separated punctures, those on the venter more sparse, and 
clothed with a silky pubescence; a transverse yellow spot on each side of 
segments 1-3, sometimes on 4; apices of both dorsal and ventral seg- 
ments with white fasciae; apical segment with a strong tooth on each side, 
between which is a well-defined prominence, also a few cilia. Legs entirely 
340 
