130 AMERICAN HYMENOPTERA. 



Black ; wings bright fulvo-ferruginuzis, the tips margined with fuligin- 

 ous ; head and thorax opaque and closely puyictate. 



Length, 23-32 mm. ; wing, 25 mm. ; spread, 54 mm. 



Black ; head and thorax opaque and closely punctate ; head trans- 

 verse, a little narrower than the thorax ;• ocelli small, distant from the 

 tops of the eyes ; eyes slightly emarginate, medium sized, broad, at 

 some distance from the base of the mandibles ; antennae extending to 

 the apex of the petiole of the abdomen ; * face with a median carina 

 extending from between the bases of the antennse, where it is most pro- 

 nounced, nearly to the apex of the clypeus, where it is more or less 

 obliterated; labium produced ; mandibles black, sometimes more or 

 less flavous ; thorax opaque and closely punctate except the sternum, 

 pleurae and sometimes the back of the mesonotum, which are shining ; 

 mesonotum with parapsidal furrows indistinct or lacking ; metathorax 

 opaque, rugose behind, the sides closely punctate and more or less 

 shining. 



Wings bright fulvo-ferruginous, the apex and sometimes a spot at 

 the base fuliginous ; nervulus interstitial ; nervellus broken above the 

 middle ; abdomen smooth and shining, the segments beyond the third 

 sometimes aciculate. 



In describing this species I have compared one specimen 

 from Mexico with the original description. 



Type. — Location,! California Academy of Science. 



This species is related to 7".' marginipennis and may prove 

 to be synonymous ; it is also related to T. morio, but may be 

 readily recognized by the bright fulvo-ferruginous wings. 

 Dr. Ashmead remarks that it evidently mimics some of the 

 spider-killing wasps (Ceropalidse, Pompihis and Pepsis) , but 

 nothing is known of its life history or habits. 



Distribution. — This species probably ranges through south- 

 western United States and Mexico. It was described from 

 California, and I have before me a specimen from Mexico. 



Location of specimens. — American Entomological Society, 

 Mexico. 



* Dr. Ashmead does not particularly mention the color of the antennae, 

 hence it appears that they are black, but I have before me an other- 

 wise characteristic specimen of this species in which at least the basal 

 two-thirds of the flagellum (the rest is missing) is fulvous, the scape 

 black. This question can not be definitely settled now as I have been 

 unable to locate the type in time to get any information on the sub- 

 ject, but there is possibly some variation in this character. 



t Collected by Mr. Eisen of the California Academy of Science, and 

 now located with that part of the collection saved from the earthquake 

 and fire of 1906, at 1219 F street, Topham, Cal. 



