842 EDWARD NORTON. 



mandibles yellow red; tegulae testaceous; body black; legs yellow red. 

 coxae black, tarsi fuscous ; wings hyaline, nervures and stigma blackish, 

 s6cond brachial cell with incomplete cross-line. 

 Pennsylvania (Smithsonian Inst.) One 9 • 



Species not seen and position not assigned. 



22. L. circumcincta. 



Lyda circumcincta, King, Ber. Mag, ii. 1808, 279. Lcpel. Mon. Tenth. 8, 21. 

 Pamphilius circumcinctus. Latr. Encyc. No. 10. 



"Antennae black; head and thorax black varied with white; abdo- 

 men black, broadly white at sides, beneath white or luteous; legs lu- 

 teous, wings hyaline. 



" Georgia.'' 



Not seen. This is likely to be the same with L. cavifrons or L. 

 semicincfa. It only differs from the first in its white venter. 



23. L. amplecta. 



Lyda amplecta, Fab. Syst. Piez. 1804, 46. 16. Klug, Berl. Mag. li. 1808, 282. 

 Lepel. Mon. Tenth. 5, 9. 

 Pamphilius amjylectus, Latr. Encyc. No. 3. 



" Antennre setaceous black, head luteous, with a broad black line on 

 vertex ; thorax blue-black, dotted with yellow on each side before ; ab- 

 domen blue-black, depressed, smooth; legs luteous; wings hyaline 

 and as in others of this genus, enclosing the body. 

 " Carolina." 

 Much like L. plagiata^ Fabr. 



Sub-family 5, CEPHIDES, Westw. 

 AntennEemulti-articulatC; 21 — 28-jointed, clavate or filiform ; labrum 

 divided into three elongated lobes; labial palpi 4-jointed, maxillae 

 bilobed, outer lobes largest, pilose ; maxillai-y palpi 6-jointed, the four 

 basal joints gradually increasing in length, the fifth very minute, the 

 sixth as long as the third. The neck is elongated and the anterior 

 tibite have but one spur as in the Uroceridce. The ovipositor is not 

 exserted and consists of two compressed plates, nearly straight and 

 serrated, but formed as in the true saw flies, defended by two external 

 2-jointed sheaths. (Westw. Mod. Class, ii, 110.) 



CEPHUS,® Latr. 

 Trachelus, Jurine, Hym. 1807, 70. 

 Astatus, Jurine, Hym. 1807, 60. 



Wings with two marginal cells (the first small) and four submargi- 



* Hartig includes Cephus in Urocericlse, from the single anterior tibial spur, 

 form of saws and form of collar. Curtis and Westwood place it among the 

 Tenthredinidse, from the form of its labium, elongated palpi, spurred posterior 

 tibiae and form of its larva particularly in relation to Lyda. 



