546 CALIFORNIA ACADEMY OF SCIENCES. 



ing all smooth and polished; the ovipositor not prominent. 



This species spin their cocoons in large masses covered 

 with a white woolly secretion, resembling a cotton -ball, 

 and it is probably parasitic on the larva of some large 

 sphinx moth. 



In appearance it resembles A. congregatits Say, but is 

 readily separated by its metathoracic and abdominal char- 

 acters. 



Described from many specimens from Tepic and San 

 Jose del Cabo. 



ToxoNEURON Say. 



14. ToXONEURON SEMINIGRUM Cr. 



Tenthiedoides seminigrum Cr. Proc. Ent. Soe. Phil, iv, p. 291. 

 Toxoueuron seminigrum Cr. Can. Ent. v, p. 69. 



Toxoneura semiuigra Cr. Syn. Hym. p. 2.S9; Ashm. Proc. Ent. Soc. 

 Wash, iii, p. 52. 



One ? specimen from San Jose del Cabo. 

 I have restored the original spelling of this genus, since 

 there is a Dipterous genus Toxoneura. 



Opius Wesmael. 



15. Opius brunneiventris Cr. 



Trans. Am. Ent. Soc. iv, p. 178. 

 One ? specimen from San Jose del Cabo. 

 The species was originally described from Texas, but 

 it also occurs in the Western States and in Canada. 



Ph^^nocarpa Forster. 



16. Ph^nocarpa mexicana sp. n. 



$ . — Length 2 mm. ; ovipositor as long as the abdo- 

 men. Polished black; prosternum rufous; three basal 

 joints of antennge, mandibles and legs brownish - yellow ; 

 palpi white; flagellum much longer than the body, brown- 

 black, pubescent, the second joint one-third longer than 

 the first. The mesonotum has a small fovea just in front 



