266 EDWARD NORTON. 



If. Posterior tibise with an outer pale line or spot. 



6. Hinder coxae black 10, externus. 



7. All the coxae with a white sj)ot 11, tibiator. 



fff. Posterior tibiae black. 



S. All the coxae with a white spot, hinder tarsi 



black ; 12. albomaculatus. 



9. Hinder coxae with a white spot, hinder tarsi 



black 7, incertus, %. 



10. Hinder coxpe black above 1.3, pumilus. 



11. " legs black 14, fuligineus. 



XX. Abdomen rufous or banded with rufous. 



1. Wings hyaline 1^). dejectus. 



2. " obscure 29, fumator. 



5. Spot on pleura; legs black and yellow 28, trosulus. 



XXX. Abdomen banded with white 2, pluricinctus. 



B. Antennae pale beneath. 



1. Abdomen white banded IS, zonalis. 



2. " " beneath 19, californicus. 



C. Antennae at tip pale. 



a. Scutellum pale 16, niger. 



b. " black 17, trisyllabus. 



I>. Antennae at tip and base pale. 



1. Abdomen rufous 20, varius. 



2. " " black and white, 21, eurythmia. 



3. " " a white s^jot on pleura 22, fascialis. 



U. Antennae pale at base. 



1. Abdomen banded with rufous on 4th segment... .23, bifasciatus. 



2. " " " " " and 6th " ....24, formosus. 



3. " " •' " or rufous, legs ru- 

 fous and yellow, spot on pleura 27, goniphorus. 



4. Abdomen black, femora l)lack banded 26, intermedius. 



5. " '■' " i>ale 25, cestus. 



Section 2. 



Antennae longer than to base of abdomen, setaceous 30, omega. 



Section I. — {Macrophja,) Hartig. 

 Antennae hardly longer than base of abdomen, thickened in middle. 



Tribe 1. Hartig. 

 Jjanceolate cell open at the shoulder, with oblique cross line. 



1. M. ezcavatus. 



AUantus excavatus, Norton, Proc. Ent. Soc. Phil, i, 1861, 143. 9 • 

 Bost. Proc. 18, 118. 

 Black; base of antennae, collar, basal plates and hinder tibitu, except at apex, 

 straw-yellow. Length 0.39. Br. wings 0.79 inch. 



% . ]^ody short and stout; thorax wide; antennas ratliur enlarged 

 in iui(h,lle, diminishing toward apex, first joint nearly twice as long as 

 second, oblicjuely truncate, third nearly as long as fourth and fifth ; 

 liead and thorax wide and large, covered with deep pits, as in Dolertis, 

 third joint of maxillary palpi short; a whitish spot in middle of lab- 



