AMERICAN HYMENOPTERA. 17 



sides parallel; tarsi lengthened and thickened, especially the posterior pair. 

 Length .45 — .50 inch. 



Hah. — Nevada, (Morrison). Closely resembles ornaticeps, but the 

 head above antennae and the cheeks are entirely black. 



Allantus elegantuliis. — 9- — Black, shining; two spots above insertion 

 of antennae, clypeus, labrum, spot beneath eyes, mandibles except tips, pro- 

 thorax, line or spot on sides of anterior lobe of raesothorax, scutellum, line on 

 postscutellum, large oblique mark on pleura, small triangular spot on pectus 

 in front of middle coxse, spot above posterior coxse, tegulse, most of legs, basal 

 plates, band on posterior margin of abdominal segments dilated laterally, and 

 venter except apex, all green or greenish-yellow; antennae nine-jointed, third 

 joint longer than fourth; wings hyaline, dusky on apical third; posterior coxse 

 except tips, apical third or half of their femora, tips of four posterior tibiae, 

 the posterior tarsi more or less, and tips of the joints of two anterior pairs, 

 black. Length .36 inch. 



%. — Posterior coxae beneath and sides, most of pectus, and sometimes the 



whole of abdominal segments 2 — 4, greenish-yellow; the two or three apical 



segments black, the posterior femora are mostly black above. Length ..35 inch. 



Hab. — Nevada, (Morrison). This is closely allied to annularis 



Norton, but easily distinguished by the entirely black antennae. 



Allantns limbatus.— 9 ■ — Black, shining; two spots above insertion 

 of antennae, line on anterior orbits, sometimes nearly reaching the occiput, 

 most of cheeks, clypeus, labrum, mandibles except tips, palpi, most of pro- 

 thorax, lateral margin of anterior lobe of mesothorax, transverse spot on base 

 of scutellum, large deeply notched mark on pleura, two spots on pectus, some- 

 times confluent, sometimes wanting, spot above posterior coxae, tegulae, coxae, 

 trochanters and legs beneath, lateral margin of abdomen above, and most of 

 venter, luteous yellow or soiled white; antennae short, .slightly thickened 

 beyond the middle, third joint much longer than the fourth; wiugs hyaline, 

 nervures fuscous. Length .40 inch. 



Hab. — California, (H. Edwards). 



Allantus afilictus. — 9 . — Deep black, shining; clypeus, labrum, mandi- 

 bles except tips, palpi, sometimes a dot at summit of eyes, narrow lower anterior 

 orbits, lower half of cheeks, upper corners of prothorax, spot on sides of pectus, 

 elongate spot on sides of pleura, spot above intermediate coxae, all the coxae 

 and trochanters more or less, four anterior legs in front, posterior femora at 

 base beneath, and extreme sides of basal plates, all white; wings tinged with 

 fuscous, nervures and stigma black; abdomen smooth and rather depressed. 

 Length .40 inch. 



% . — Narrower, and marked like the 9 except that the white spot at summit 

 of eyes, lower anterior orbits and spot at sides of basal ()l&tes are wanting, and 

 the posterior femora have a white line on under side. Length .35 inch. 



Hub. — Nevada, (3Iorrison). 



Allantus nevadensis.— 9 .—Black ; clypeus, labrum, mandibles except 

 tips, lower part of cheeks, spot on sides of collar, posterior angles of prothorax, 

 sublunate line on pleura, spot on tegulae, spot above posterior coxae, four anterior 

 cozae except base, tips of posterior pair and broad line on sides, four anterior 



TRANS. AMER, ENT. SCO. VIII. (3) JANUARY, 1880. 



