110 S. A. ROHWER. 



Submedian cell equal or longer than the median; pronotum with 

 two yellowish spots 16. 



16. Metanotum with a triangular area parvus Roh. 



Metanotum without a triangular area 17. 



17. Pronotum notched^ abdomen red vierecki Roh. 



Pronotum not notched; abdomen black affinis Roh. 



In looking over descriptions I find that Mr. Cameron (Tran. 

 Am. Ent. Soc. xxvii, Nov., 1901, p. 315.) assigns a species 

 (flavomaculatus Cam.) to the genus Alyson with some doubt; 

 I think it should be placed in the genus Niteliopsis, because 

 it has but one spur at the apex of the middle tibiae — the genus 

 Alyson has two apical spurs to the middle tibiae. It is distinct 

 from any known North American species, falling in the above 

 table nearer affinis than any other species. 



Niteliopsis inermis (Cresson) Ashmead. 



Male. — Length 4 mm. Clypeus with the lateral anterior margin in 

 the middle produced into a large quadrate tooth which is rounded at 

 the apex; middle carina extending to the middle of the produced por- 

 tion. Head opaque, finely granular; frontal carinae broad, low, not 

 very distinct, extending from near top of eyes to just above the 

 antennae, where they meet to form a well defined middle carina. An- 

 tennae subclevate, joints 6-9 very slightly rounded beneath, apical 

 joint acute, third joint a little longer than fourth. Ocelli in a little 

 less than an equilateral triangle; no furrow from anterior ocellus. 

 Prothorax not sharply truncated nor carinated, anterior margin 

 rounded. Dorsulum and scutellum very finely striato-rugose; suture 

 between them distinct. Metanotum with a triangular area which is 

 longitudinally striated; posterior face granular, with a shallow middle 

 furrow. Metapleurae transversely striato-granular. Radial cell trun- 

 cate, appendiculation not strong, in the specimen before me it is 

 wanting. Tran. med. a little beyond basal; first recurrent not squarely 

 interstitial with the first tran. cu., but a little basal; second recurrent 

 nervure curving basally and joining the second cubital at about the 

 middle. Eight ventral plate deeply acutely notched, lobes broad. 

 Color black; mandibles (apices piceous), tubercles, two spots on pro- 

 notum, postscutellum, most of the tegulae, four anterior femora at 

 the apex and beneath almost to the base, all the tibiae and tarsi creamy- 

 yellow. The middle within and the posterior tibiae are reddish, and 

 specimens may be found with a black stripe. Basal joints of the 

 antennae piceous. Face, clypeus, mesopleuras, abdomen above with 

 silvery pile. Wings hyaline, the apex dusky. Venation brown. 



The above description was made from a male taken by Rev. 



