408 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.59. 



Park, New Mexico, collected on Chilopsis June 9, 1898, by T. D. A. 

 Cockerell. 



NYSSON (NYSSON) SPHECODOIDES Bradley. 



A female, which agrees well with the original description of the 

 male, was collected in the mountains near Claremont, California, by 

 C. F. Baker, and is now in the National Collection. 



NYSSON (NYSSON) MARLATTI, new species. 



In habitus and general appearance like aurinotus Say, but the scu- 

 tellum is not margined laterally. 



Female. — Length, 7 mm. Anterior margin of clypeus narrowly de- 

 pressed, nearly truncate, not dentate; front and vertex with large, 

 distinct, close punctures; no tubercles between the ocelli; frontal carina 

 obsolete; antenna slightly thickening apically, the third joint slightly 

 longer than the fourth, the apical joint distinctly longer than the pre- 

 ceding, obtusely pointed apically; lateral angles of pronotum rounded, 

 the surface sculptured like the scutum; scutum with a median, longi- 

 tudinal impression anteriorly, the surface with large, distinct, close 

 punctures and with small, inconspicuous punctures in the interspaces; 

 mesepisternum coarsely punctato-reticulate; scutellum not margined 

 laterally, coarsely rugoso-punctate ; dorsal, basal middle of propodeum 

 with irregular raised lines, the spines long, rather stout; posterior face 

 of propodeum with a median carina ventrally, the lateral carinae com- 

 plete, strong, the area between irregularly reticulate; nervellus post- 

 f ureal by its width; abdomen with large, distinct punctures which are 

 usually separated by two or three times their width, the punctures of 

 the preultimate segment coarser and closer; pydidium well denned, 

 broad, narrowly rounded apically, the surface coarsely, closely, irregu- 

 larly punctured. Black, the head and thorax with slightly golden 

 pile, which is especially dense on the front, dorsal margin of pronotum 

 and dorsal lateral part of propodeum (but not on first tergite); legs 

 below coxae, first tergite and second sternite rufous ; first four tergites 

 with elongate yellow spots; wings subhyaline, venation black. 



Type locality. — Neuecest, Texas. 



Type.— Cat. No. 23512, U.S.N.M. 



Described from one female collected April 28, 1896, by C. L. Marlatt, 

 for whom the species is named. 



NYSSON (NYSSON) MINIMUS, new species. 



Allied to lateralis Packard and fidelis Cresson, but is smaller and 

 differs in details of punctuation. It can hardly be the female of 

 simplicomis Fox as the sculpture of the abdomen is coarser, the 

 sculpture of the mesoscutum is different, and there is no marked 

 difference in sculpture between the scutum and mesopleurae. 



Female. — Length, 4.5 mm. Anterior margin of the clypeus de- 

 pressed, truncate, the surface with distinct, separate, small punctures; 



