no. 1837. NEW SPECIES OF WASPS— ROHWER. 569 



GORYTES (HOPLISUS) HELIANTHI, new species. 



Female. — Length about 10 mm. Differs from diversus Fox only as 

 follows: Front and mesonotum more shining, without the very fine 

 striations; antennas more robust about as in diversus male; enclosure 

 with the stria? wanting or nearly beyond base; front yellow; a black 

 diamond-shaped spot enclosing ocelli; enclosure black, base of dorsal 

 segments 2, 3, and 4 black, the following segments rufous; propodeum 

 without yellow, rufous; venation darker and the second discoidal cell 

 fuscous. 



Boulder, Colorado. One female collected at flowers of Helianthus 

 pumilis, September 8, 1908, by S. A. Rohwer. 



Type.— Cat. No. 13750, U.S.N.M. 



GORYTES (HOPLISOIDES) KNABI, new species. 



Belongs near denticulatus Packard, but vertex is flatter, the scutel- 

 lum with sparser punctures, the clypeus not so angled above, the 

 stria? of enclosure better defined, legs much darker, costa and stigma 

 dark, and is slightly smaller. 



Male. — Length 7 mm. Anterior margin of the clypeus truncate, 

 the surface with fine close punctures, with a few large punctures 

 scattered over it; front finely granular, with large, distinct, widely 

 separate punctures; depression from the anterior ocellus distinct 

 though not strong; pdstocellar line much greater than the ocellocu- 

 lar line; eyes converging to clypeus but not strongly so; third anten- 

 na! joint distinctly longer than fourth; flagellum thickened apically; 

 dorsulum and scutellum with large, distinct punctures; suture 

 between the dorsulum and scutellum foveolate; large punctures of 

 the mesopleurse and propodeum somewhat sparser than those on 

 the dorsulum; enclosure of the propodeum not sharply defined with 

 about sixteen carina?; abdomen with large punctures, those of the 

 first segment smaller and sparser; spines of the legs feeble. Black; 

 scape in front, narrow line on most of inner orbits, line on pronotum, 

 tubercles, spot behind, posterior border of scutellum, line on post- 

 scutellum, large spots on metathorax, first dorsal segment except a 

 large median basal spot, a narrow line on the dorsal and ventral seg- 

 ments 2-5 3'ellow; femora and tibia? beneath brownish-yellow. 

 Wings hyaline, radial cell clouded; venation brown. 



Progreso, Yucatan, Mexico. One male collected August 6 by Mr. 

 F. Knab (for whom the species is named) during an hour's stay on 

 shore. 



Type.— Cat. No. 13751, U.S.N.M. 



