G. C. DAVIS. 233 



EXCAVAKITS n. gen. 



Characterized by having the scutelluni deeply aud broadly exca- 

 vated above, so that it apparently is surrounded by a high carina; 

 nietathorax truncate posteriorly and with the posterior median area 

 very large, broader than high and with strong spines at the lateral 

 apices; oblique grooves at base of second segment are broad and 

 made rugose by transverse ridges crossing them. 



The two species may be separated by : 



Posterior tihiaj with yellowish white aunuli aiiiiiilipeK Cress. 



Posterior tibiae dusky, without anuulus vittic«lliw Cress. 



Excavarus aniiiilipes Cress. {C'teniscus), Trans. Amer. Ent. Soc. ii, 112. 



% . — 9-11 niui. Black, with face, anterior orbits, mouth-parts, cheeks heneath, 

 tegulse. line in front and beneath, apex of scutelluni, postscutelluiu and capillai-y 

 lines each side of them and apical margins of abdominal segments beginning 

 with the second, the margins becoming broader toward apex, yellow ; nieso- and 

 metasternum and lower half of their pleura? rufous ; pectus, four anterior legs 

 and posterior coxse ferruginous, basal part of trochanters and the femora of hind 

 legs piceous, the latter sometimes rufous in the middle; posterior tibiae yellow, 

 rufous beneath and with a black annulus near the base and broader one at the 

 apex; tarsi black, yellow on basal half of the heel segment; antenna reildish 

 brown, piceous at base ; wings hyaline, nervures and stigma brown ; front coai'sely 

 punctui-ed and swollen in the center: clypeus separated by a deep groove; pleura 

 polished without puncture: niesonotum sparsely punctured ; scutellums truncate 

 behind ; metathorax rugose, the two longitudinal carinse prominent, apical me- 

 dian area transversely aciculate and divided by a vertical carina: first and basal 

 half of the second abdominal segment scabrous, carinae prominent; remainder 

 of the abdomen finely punctured. 



Two specimens from Massachusetts and N. Illinois (Dr. Nason) 

 (type, coll. Amer. Ent. Soc). 



Excavarus vitlicollis Cress. (Cteniscns), Trans. Amer. Ent. Soc. ii, 113. 



% (V).— 8 mm. Black, with face, anterior orbits, cheeks beneath, mouth-paits, 

 parallel lines on mesonotum, tegulse, line in front, line beneath, scutellums, pectus, 

 sternum and lower pleurae, four anterior coxae and trochanters, venter, with 

 lateral margin of segments near apex and median spots at apex of the abdominal 

 segments, white: legs and metasternum pale rufous; posterior tibiae and tarsi 

 blackish; antennae fulvous, brown at base: wings hyaline, nervures and stigma 

 hrown, pale at base; metathorax and most of second abdominal segment closely 

 punctured; basal segment rugulose, indistinctly longitudinally aciculate, cariuse 

 small. 



Type specimen from Massachusetts (coll. Amer. Ent. Soc). 



ANI>ERIS n. gen. 

 Characterized by having the abdomen slender, cylindrical, sub- 

 clavate and without the obliqne grooves being present at base of 

 second segment, or at least not more than slightly indicated ; the 



TRANS. AM. ENT. SOC. XXIV. (30) SEPTEMBJ^R, 1697. 



