260 NORTHERN ZOOLOGY. 



CLIII. Genus CRYPTOCENTRUM. Kirb. 



Head between transverse and globose ; face quadrangular, with the anterior margin crenate ; 

 palpi long, filiform : antennae slender, first joint thick ; second minute ; third longer than the rest : 

 trunk ovate-oblong, subcompressed ; neck moderately long ; scutellum trapezoidal ; legs slender, 

 posterior pair elongated : upper wings-apical areolets three ; middle four, viz. 2, 2, without a cellule ; 7 

 basilar three ; under wings-areolets seven, viz. 4, 3 : 8 abdomen sessile, smooth, subcompressed, in 

 the female clubbed at the apex; four first segments longer than the rest, the first curved, rather 

 wider at the apex; the three next are wider than long, the last is minute and triangular: at the 

 extremity the tail is cleft for the passage of the ovipositor, this cleft is formed by the turning up of 

 the sides of the last ventral segment ; ovipositor very short ; the four last ventral segments, at least 

 in the dead insect, project so as to form an elevated ridge in which the ovipositor is concealed. 



The insect from which I have taken the characters of this genus does not appear to arrange 

 under any of those of Gravenhorst ; its place would be near Accenites. 



(3(50) 1. # Cryptocentrujvi lineolatum. L'meolate Cn/ptocentrum. 



C. (lineolatum) atrum, subnitidum ; facie, palpis, antennis scapo extrorsum, oculorum orbila utrinque, pedibus quatuor aniicis 

 basi, scutello linealis duabus transversis, abdominisque scgmentis apice, posterioribus interrupte, niveis. 



Lineolate Cryptocentrum, black, rather glossy ; with the face, feelers, scape of the antennae externally, orbit of the eyes on 

 each side, the four anterior legs at the base, two transverse streaks of the scutellum, and the apex of the abdo- 

 minal segments, in the posterior ones interruptedly, snowy-white. 



PLATE VI, FIG. 1. 



Length of the body 6 lines. 



A single specimen taken in Lat. 65°. 



DESCRIPTION. 



Body very black, somewhat glossy, sprinkled with whitish decumbent hairs. Head subtransverse, 

 hollowed out behind to receive the neck; face with a streak on each side the eyes; feelers and scape 

 of the antennae on the outside white : antennae slender, black, externally obscurely testaceous, with a 

 white annulet below the middle ; trunk compressed ; margin of the collar on each side, tegulae, and 

 two transverse elevated streaks on the scutellum, white : four anterior legs with the coxae and tro- 

 chanters, tip of the thigh and under side of the tibiae, white ; the thighs, except the tip, testaceous ; 

 upper side of the tibia? and tarsi, and long posterior legs, black : wings hyaline with black nervures : 

 abdomen sessile, with the last segments dilated for the reception of the ovipositor; the apical margin 

 of all the segments but the two first is interruptedly white ; but in those segments the interruption 

 is not perfect. 



1 By this name Mr. Stephens distinguishes an areolet which Jurine calls the petiolated cubital cell (39, t. i, f. 3, b.J and 

 Gravenhorst the areolet. 



8 Introd. to Ent. iii. 630—. 



