262 MANDIBULATA. HYMENOPTERA. 



antennae about half the length of the body, curved at the tip, fuscous, rusty 

 or yellow beneath ; abdomen silky, somewhat sessile, narrow and sublinear, 

 or a little clavate in the male, broader, clavate-fuciform in the female^ 

 red, with the basal segment, and sometimes 2, more or less united, dots on 

 the 2nd, black; the female with the basal portion of the 1st segment only 

 black ; legs shortish, 4 anterior fulvous, with the base of the femora occa- 

 sionally more or less black, the coxse and trochanters yellow beneath; 

 posterior black, with the base of the tibiffi reddish; tips of the trochanters 

 yellowish ; wings rather smoky-hyaline ; cellule irregular 3-angular, petio- 

 lated. 



A variable species : the terminal segment of the abdomen is occasionally black. 

 Not uncommon in the vicinity of London, frequenting woody 



places, umbelliferous flowers, &c. in June and July : found also at 



Netley, in the New Forestj &:c. 



Sp. 89. quadratus. Niger, ahdomine rufo, hasi nigra, pedibus anterioribus 

 stramineorfulvis, tibiis posticis basi pallida, antennis subtus, ore maculaqiie 

 quadrata faciei flavis. (Long. corp.SJ — Slin. ; Exp. Alar. 5| — 8 lin.) 



Tr. quadratus. Steph. JVomen. 2d edit. Gen. 715. 89. 



Black : palpi and movith yellow, face with a large quadrate yellow spot, 

 separated from the mouth by a transverse black streak ; antennae about half 

 the length of the body, stoutish, black, yellow or red beneath ; abdomen 

 red, linear or somewhat clavate in the male, with the basal segment, and 

 occasionally a double spot, or abbreviated transverse fascia on the 2nd 

 black; of the female broad and clavate, and with the basal half of the 1st 

 segment black ; legs moderate, 4 anterior yellowish-red, with the coxae and 

 trochanters beneath paler, the outer upper edge of the femora very rarely 

 black towards the base ; posterior black, trochanters at the apex yellowish, 

 tibiae pale towards the base ; wings rather smoky-hyaline ; cellule small, 

 3-angular, petiolated. 



Also subject to considerable variety. 



More abundant than the last, at least within the metropolitan 



district, occurring on umbelliferous flowers in June, &c. 



Sp. 90. atriceps. Niger, abdomine rufo, basi nigra, pedibus anterioribus tibiisque 

 posticis rvfis, orefulvo, coxis et trochanteribus atris. (Long. corp. 4 — 5 lin.; 

 Exp. Alar. 7—8 lin.) 



Tr. atriceps. Steph. Nomen. 2d edit. Gen. 715. 90. 



Black: mouth tawny; abdomen silky, red, its basal segment black, with the 

 extreme margin red ; legs moderate, 4 anterior with the femora, tibiae, and 

 tarsi red, all the coxa> and trochanters deep black, posterior with the feinora 

 black, their extreme apex and the tibiae red, tarsi fuscescent ; wings some- 

 what hyaline ; cellule moderate, 3-angular, petiolated. 

 Found, but somewhat rarely, near London in June. 



