274 Mr. Kenneth J. Morton on 



Cordulegaster annulatus, Latr. 



(J. Face yellow with black hairs ; a short transverse rather broad 

 black frontal line; rhinarium black, forming a broad transverse 

 band which encroaches slightly upon the anterior margin of the 

 nasus ; labrum yellow, narrowly bordered with black at base and on 

 the sides but not in front, the black forming a little projection in the 

 middle (virgule) not reaching the margin. Labium and palpi reddish 

 yellow; vertex and ocelli black, this colour also bordering in a 

 sinuous manner the base of the f rons and descending narrowly along 

 the eyes ; occiput small, yellow, furnished with a crest of yellow hairs ; 

 it is swollen especially behind, where it is almost bi-vesiculous, 

 marked with a sunken black point. Back of the eyes black with a 

 white band bordering the eyes towards the genae. 



Eyes of a brilliant green in life. 



Prothorax black, bordered with yellow in front and behind, where 

 this colour is interrupted in the middle of the margin. 



Thorax hairy, black marked with yellow, thus : two cuneiform 

 bands in front, and two oblique isolated equal bands on each side, 

 the last not terminal. Between these bands a line divided into two 

 or three spots or entire. There are also an upper humeral point, a 

 point at the wing attachments, an inter-alar spot between each of the 

 wings, double between the hindwings ; finally, the basal articulation 

 of the legs and the breast are marked with yellow. 



Abdomen cylindrical; constricted between segments 2-6, a little 

 broader between 7-8, shining black, annulated and spotted with 

 yellow, thus : 1st segment with a half-ring interrupted before the 

 end ; 2nd with a dorsal ring, rather broad, median above, becoming 

 basal upon the sides comprising the oreillettes which are moderate, 

 denticulated with black at the end, and a second ring, terminal, 

 interrupted by the dorsal arete and sometimes upon the sides ; 3rd, 

 4th, 5th, 6th with a moderate median ring, and a narrow posterior 

 one divided in two by the dorsal arete, which remains black ; these 

 rings do not exist on the under side of the segments; 7th and 8th 

 having the rings a little nearer the base, more interrupted in the 

 middle ; the terminal ring absent on 8th ; the 9th with a little basal 

 lateral spot ; 10th quite black, its posterior margin a little projecting 

 and depressed in the middle. 



Anal appendages black, superior a little shorter than the last seg- 

 ment, closely approximated at their base, almost compressed verti- 

 cally, a little divergent ; the outer margin thickened, almost straight 

 or a little sinuous ; the inner margin tapering to the point, which is 

 fine and sharp, and this side presenting in its first fourth a strong 



