160 MANDIBULATA. — HY MEXOFTEU A. 



Extremely abundant, throughout the metropolitan district, in the 

 spring and summer ; occurring in plenty at the roots of trees, during 

 the winter : also found in Shropshire and in Scotland. 



Sp. 90. confusorius. Niger, segmentis 2 et 3 rufis, tibiisjlavis apice ohsciiro, 

 antennarum annulo albo. (Long. corp. 4 — 7 lin.; Exp. Alar. 7^ — 9 lin.) 



Ic. confusorius. Gravenhorst. — Steph. Catal. 349. No. 4438. 



Black ; palpi and mandibles occasionally red ; inner orbits reddish ; antennae 

 involuted, with the 8th to 16th joints more or less white, red or brown 

 beneath ; thorax very rarely with a white dot beneath the whig-s ; scutellum 

 white ; abdomen ovate, with the 2nd and 3rd segments red or dull saffron, 

 sometimes with the back yellowish ; the 5th rarely entirely black, but 

 marked with a white dot or spot, the 6th and 7th always with a white spot ; 

 legs with the anterior femora rarely entirely red, with a fuscous spot at the 

 base, generally black, with the tip red, middle the same, posterior black, 

 sometimes red at the base ; 4 anterior tibise yellow or ochreous, reddish 

 within, the anterior pair with the apex reddishj and the 2nd pair with it 

 brownish; posterior yellow, the extreme base red or fuscous, the apex 

 brown or black, sometimes edged with red ; tarsi red, posterior occasionally 

 black at the tip; wings yellowish-hyaline, stigma red or safTron, costa and 

 scales fuscous, the last sometimes red ; cellule 5-angular. 



The tibise are sometimes reddish-yellow, with the apex of the hinder pair 

 black. 

 Found with the preceding, and nearly as abundant. 



Sp. 91. silaceus. Niger, segmentis 2 et 3 silaceis, pedibiis rufis, coxis et tro- 

 chanteribus nee non femoribus posticis nigris, tibiis flavicantibus, antennarum 

 annulo albo. (Long. corp. 5 lin.; Exp. Alar. 9^ lin.) 



Ic. silaceus. Gravenhorst, i. 279. — Steph. A'omen. 2d edit. col. 133. 



Black : antennae with the 1st to 7th joints dull rusty beneath, the 9th to 14th 

 generally white, red beneath; scutellum white; abdomen with the 2nd and 

 3rd segments pale red, yellow towards the apex, the 4th with a white dot, 

 the 2 following with a white spot; legs with the coxse and trochanters 

 black ; femora red, posterior from the middle to the apex black ; tibise 

 yellowish, 4 anterior beneath and at the apex red, posterior black at the 

 tip ; tarsi red, posterior fuscous at the apex ; wings smoky-hyaline, with 

 the stigma red, costa and scales fuscous. 

 Found in June, near London : very rare. 



Sp. 92. ammonius. Niger, antennis 3-coloribus, segmentis 2 et 3 tibiisque rufis; 

 segmentis Q et 7 puncto dorsali albo. (Long. corp. 5 lin. ; Exp. Alar. 9g lin.) 



Ic ammonius. Gravenhorst. — Steph. Catal. 349. No. 4439. 



Black: inner orbits blood-red ; antennae with the 1st to 7th joints of the female 

 rusty-red; of the male with the 1st joint black, the 2nd to 7th rusty or 

 brown, 7th or 8th to 13th white, reddish beneath, remainder fuscous ; thorax 



