AMERICAN HYMENOPTERA. 245 



Tribe 2. Uiidev wings one middle eell. 

 l)iv. -'1. Antennae filiform, short. 



Black, thorax before and pleural spot ru- 

 fous 4, barda. 



;■). dubia. 

 f), mexicana. 



Ochre-yellow, })leurti black 7. marginicollis. 



'• " pale s, ochrea. 



Black, collar and legs yellow lufoiis 9, rubi. 



" tegulpe, collar and legs white 10, medius. 



" " " black, apex of femora 



and legs white U, tilise. 



B. Antennpe bristle-shaped, long. 



Black, thorax mostly rufous 12, rudis. 



'■ tegulse and collar rufous KJ, rufula. 



Wholly black, anterior tibiae obscure, in- 

 ner claw tooth large 11, fumipennis. 



Wholly black, anterior tibite obscure, in- 

 ner claw tooth minute 15, nubilipennis- 



Section II. Lanceolate cell contracted in middle. 



Testaceous, tergum black lO, halcyon. 



" thorax and tergum black... 17, montana. 



Section III, Lanceolate cell with straight cross nervure l!S, nova. 



Section IV. Lanceolate cell with oblique cross nervure. 



Tribe 1. Under wings with no middle cell lit, obsoletum. 



Tribe 2. " " " two " cells. 



Black; a round spot below stigma 20, cerasi. 



Black; a clear fascia at apex of wings 21, fasciatus. 



Tribe .^. Under wings with one middle cell. 



Black; tegulae and collar black 22, rosae. 



" " " " white, legs be- 

 low the knees njostly white 2.'J, ignotus. 



Black; tegulse and collar white, legs be- 

 low the knees mostly white 24, q. alba. 



Section V. Lanceolate cell without cross nervure. 



Black, with white collar and legs 2.:), flavipes. 



" " rufous collar 2(i, ruficollis. 



Xot known 27, obtusa. 



2s, labiata. 

 Section 1. {£!cnnocampn), llartig. 

 Lanceolate cell petiolate. Antennaj tiliform, not thickened in middle. 

 Tribe 1. (B/ennocampa), llartig. 

 Under wings without middle cell. 

 1. S. vitis. 



Tenthredo pygmcea, Say, Long's Second E.xp. II, 1824, 318, 5, J 'J, . 

 IScluiidria vitis, Harris' Cat. hSuJi. 



Inj. Ins., p. 41.3. 

 Norton, Bost. Froc. viii, 219, $ %. 

 ".-shining black, with red shoulders. Length 0,24. Br. wings 0.40 inch. 

 5 5) . Body short and stout, shining black 3 autcnnie fiiitorm abova 



