12 
Journal New York Entomological Society. 
[Vol. IV. 
6. Last dorsal segment not prominent between the teeth, subtruncate; lateral spots 
on first dorsal segment large, covering almost the entire segment, plagiatus. 
Last dorsal segment prominently angulate between the teeth; spots on first seg" 
ment transverse, confined to apical portion of segment. aequalis. 
7. Clypeus bituberculate at apex; punctuation of head and thorax very coarse 
almost rugose (hind femora, in part, reddish). compactus. 
Clypeus not tuberculate at apex.8 
8. Abdomen not at all reddish . 9 
Abdomen reddish basally (clypeus and scape beneath yellow; abdomen with 
sparse, shallow punctures)... rusticus. 
9. Apical antennal joint scarcely enlarged or curved, obtuse at apex, the preceding 
joint not produced at apex beneath (tegulae black; dorsulum rugosely punc¬ 
tured; punctures of abdomen distinct but feebler than in lateralis'). 
simplicicornls. 
Apical antennal joint enlarged, strongly curved, truncate at apex, the preceding 
joint produced somewhat beneath at apex. 10 
10. Clypeus and scape yellow (punctures of abdomen rather subtile) . 11 
Clypeus black.12 
11. Antennae short, stout, when stretched back not reaching the tegulae; form 
rather robust, tegulae dark. tristis. 
Antennae longer, slenderer, when stretched back reaching, or almost reaching, 
the tegulae; form narrower; tegulae pale-testaceous, or with a yellow spot. 
fidelis. 
12. Abdomen with unusually strong punctures, those of the front distinct and 
separated; scutellum marked with extremely large, sparse punctures. 
lateralis. 
Abdomen subtilely punctured; punctuation of front close, so that it has a gran. 
ular appearance; scutellum coarsely rugose. subtilis. 
13. Apical antennal joint obliquely truncate at tip, more or less curved. 14 
Apical antennal joint rounded at tip, or obtusely truncate, not or scarcely 
curved ; markings white ; first segment with a continuous fascia. 
albomarginatus. 
14. Abdomen not all reddish, legs reddish testaceous; enclosure of the middle 
segments with its ridges evenly spaced. mellipes. 
Abdomen reddish basally; coxae, trochanters and femora black, tibiae and 
tarsi pale.. pumilus. 
1. Nysson texanus Cress. 
Nysson texanus Cresson, Tr. Am. Ent. Soc. IV, p. 223, $ £ • 
Paranysson texanus Cresson, ibid. IX, p. 273. 
Nysson texanus Handlirsch, Sitzb. Akad. d. Wissensch. Wien, Math. 
Naturw. Classe, I Abth. XCV, Bd. p. 297. 
Texas, Nebraska; Montana; Lewiston, Idaho (Aldrich); Las 
Cruces, New Mexico (Cockerell). Recorded by Handlirsch from 
Georgia and South Carolina. 
