348 Annals Entomological Society of America [Vol. IX, 



Xylocelia argentinae Rohwer. 



1909. Diodonlus urgentincE Rohwer, Trans. Amer. Ent. Soc, xxxv, p. 104. 



Type locality: Cripple Creek, Colorado. 



Xylocelia vallicolae Rohwer. 



1909. Diodontus valHcoIce Rohwer, Trans. Amer. Ent. Soc., xxxv, p. 104. 



Type locality: Florissant, Colorado. 



Xylocelia vallicolae salicis Rohwer. 



1909. Diodontus vallicolcs salicis Rohwer, Trans. Amer. Ent. Soc., xxxv, p. 105. 



Type locality: Boulder, Colorado. 

 Xylocelia americanus Packard. 



1867. Diodontus americanus Packard, Proc. Ent. Soc. Phila. vi, p. 393. 



Type locality: Brunswick, Maine. 



Xylocelia spiniferus n. sp. 



9 . Length 4.5-5mm. Labrum broadly and very shallowly emarg- 

 inate; front finely granulate with distinct punctures; vertex more 

 closely punctured, cheeks sparsely punctured; antennge puberulent, 

 first joint of flagellum slightly longer than the second; mesoscutum with 

 fine, distinct punctures, the punctures quite dense anteriorly; mes- 

 oscutellum shining, microscopically punctate; episterna coarsely 

 reticulate, obliquely rugose posteriorly; propodeum coarsely reticulate 

 above, more openly so on the posterior face; sides of propodeum coarsely 

 rugose; the lateral margins of the propodeum produced, forming a 

 short, blunt spine; abdomen apparently impunctate; wings hyaline; 

 stigma and nervures of anterior wings piceous. Black; mandibles 

 yellowish (except reddish at tips); palpi, tegulas, anterior tibiae and 

 tarsi, intermediate tibiae in front, intermediate tarsi basally, apex 

 of posterior femora and base of posterior tar.si, all light testaceous. 



cf. Unknown. 



Type: A female collected at Omaha, Nebraska, June 12, 

 1914 (L. T. Williams); paratypes as follows: Omaha, June 12, 

 1914 (L. T. Williams), 2 9 ; Omaha, July 19, 1914 (L. T. 

 Williams), 1 9 ; Omaha, July 20, 1914 (L. T. Williams), 2 9 • 



Apparently related to americanus from which it differs in 

 having the legs more or less testaceous, the front distinctly 

 and fairly closely punctate, and the tarsal joints not unusually 

 spinose. 



Xylocelia antennatus n. sp. 



9. Length 4.5mm. Labrum deeply and roundly emarginate; 

 front finely granulate, distinctly punctate; vertex and occiput similarly 

 sculptured; cheeks sparsely punctate; antennae short, slightly longer 



