HYMENOPTERA FROM LOWER CALIFORNIA. IO5 



Tachytes sp. One 3 , related to sericatits Cress. 

 San Jose del Cabo, October. 



Tachytes exornatus Fox. 



In a paper on the North American Larrida?,* I described 

 a new species of Tachytes from New Mexico, based on 

 a 5 . There are before me three females from San Jose 

 del Cabo, October, and El Taste 3,400 feet, that evidently 

 belong to this species. They may be characterized as 

 follows : 



$ . — Black; the legs, except coxee and trochanters, 

 and the abdomen red, except a blotch on the third dorsal 

 abdominal segment, the fourth and fifth dorsals entirely, 

 and spots or blotches on the ventral segments, all of 

 which are black; basal half of mandibles, spot at apex of 

 scape beneath and the tegula% also reddish; head in front, 

 dorsulum, especially on sides, mesopleurai, with pale golden 

 pubescence, that on the other parts of the thorax and on 

 the occiput, grayish; cheeks, legs more or less and the 

 apical margin of dorsal abdominal segments 1-4, with 

 silvery pile, that on the pj-gidium golden; wings yellow- 

 ish, iridescent, dusky at apex; nervures reddish testa- 

 ceous. Anterior margin of clypeus somewhat rounded- 

 out and armed with two teeth on each extreme side ; space 

 between the eyes at the top less than the length of an- 

 tennal joints 2 and 3 united ; first joint of flagellum scarcely 

 one-quarter longer than the second; scutellum not im- 

 pressed; metanotum not furrowed, the fovea at apex dis- 

 tinct; tibia? and tarsi strongl}" spinose ; longer spur of 

 hind tibia? slightly longer than the first joint of hind tarsi; 

 ventral abdominal segments 3-6 sparsely punctured, and 

 segments 2-5 with a transverse row of bristles before 

 their apices. Length 18—19 mm. 



* Proceedings of the Acad. Nat. Sciences, Phila., 189,"?, pt. 3. 



