12 Journal New York Entomological Society. [Voi. 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 eequalis. 



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 (tegulse black ; dorsulum rugosely punc- 

 tured ; punctures of abdomen distinct but feebler than in latei-alis). 



simplicicornis. 



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 



1 1. Antennns short, stout, when stretched back not reaching the tegulse ; form 



rather robust, tegulse dark tristis. 



Antennre longer, slenderer, when stretched back reaching, or almost reaching, 

 the tegulse ; form narrower ; tegulse 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 ; coxse, trochanters and femora black, tibise and 

 tarsi pale pumilus. 



I. Nysson texanus Cress. 



Nysson texanus Cresson, Tr. Am. Ent. Soc. IV, p. 223, ^ J . 

 Faranysson texanus Cresson, ibid. IX, p. 273. 



Nysson texamts 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. 



