no. 1837. NEW SPECIES OF WASPS— ROHWER. 587 



SILAON MEXICANUS, new species. 



Closest to inermis (Cresson), but differs in the entire last ventral 

 abdominal segment and other characters. 



Male. — Length 4.75 mm. Middle of the clypeus produced into a 

 broad, truncate lobe, anterior margin impunctate, shining, basally 

 finely granular as in the rest of the front; carinae as in inermis but 

 not as strong; vertex and occiput with distinct close punctures; 

 ocelli in nearly an equilateral triangle; pronotum rounded, neither 

 angled or crested; dorsulum, scutellum, and mesopleurae with rather 

 large, distinct, rather close punctures; triangular area of the propo- 

 deum with close longitudinal striae ; propodeum laterally and posterior 

 face finely striato-granular ; legs and venation as in inermis; abdomen 

 very finely sculptured, apical ventral plate entire at apex. Black; 

 mandibles, line on pronotum, tubercles, anterior femora apically more 

 broadly so beneath, spot on intermediate femora beneath, four ante- 

 rior tibiae and tarsi, and posterior tarsi yellowish; tegulae and hind 

 tibiae brown ; usual sparse silvery pubescence ; wings dusky, venation 

 black. Antennae robust, somewhat flattened. 



San Ragael, Jicoltepec, Mexico. 



Type— Cat. No. 13768, U.S.N.M. 



Belongs to species group cliilensis in the foregoing arrangement. 



Genus MISCOPHINUS Ashmead. 



MISCOPHINUS NIGRICEPS, new species. 



Related to M. texanus Ashmead, but the thorax is entirely rufous 

 and the median carina of the propodeum is incomplete. 



Female. — Length 7 mm. Clypeus broadly rounded anteriorly with 

 the usual lateral narrow notch; head finely, opaquely, granular; no 

 impressed line from the anterior ocellus; anterior ocellus not sur- 

 rounded by a depression; third antennal joint distinctly longer than 

 the fourth; pro- and mesothorax with fine separate punctures; propo- 

 deum without a complete median carina, finely, obliquely striate, 

 posterior face not so closely striate, separated from the dorsal surface 

 by a fine carina, with a median depression; abdomen, legs, and wings 

 normal. Ruf o-ferruginous ; apex of abdomen dusky; head black, 

 clypeus, mandibles (apices piceous) and first three joints of antennae 

 ruf o-ferruginous. Wings hyaline, apical margin broadly dusky; 

 venation dark brown. 



Santa Monica, California. One female collected by Mr. C. E. Hutch- 

 inson, September 15, 1901. 



Type.— Cat. No. 13553, U.S.N.M. 



