Feb., '03] ENTOMOLOGICAL NEWS. 39 



hivers2i?n, lo7iguni\ sont chacune d'un type different sous le 

 rapport de la proportion des appendices anals, et quant au me- 

 cistogastriwi qui constitue le 2e groupe, il est encore plus car- 

 acterise par son abdomen enormement long [50-52 mm. $ , 

 37-39 9]." 



Somatochlora provocans, n. sp. (PI. Ill, figs. 7, 8). 



cT. Most of the face, including the labium, yellow ; free margin of the 

 labrum narrowly edged with black, a pair of small black spots on the 

 nasus ; frons superiorly metallic-violet or -greenish-blue, which extends 

 on to the anterior surface but does not reach the lower margin ; the yellow 

 on each lateral surface of the frons is consequently connected with its 

 fellow of the opposite side by a transverse, inferior frontal, yellow band ; 

 vertex metallic blue-violet, occiput and rear of the eyes black ; labrum, 

 occiput and rear of the eyes with numerous pale hairs, rest of the head^ 

 (except the eyes) with many blackish hairs. 



Front and hind prothoracic lobes very pale yellow almost white, middle 

 lobe dark brown ; hind margin of hind lobe convex, entire. 



Thorax and abdomen dark metallic-violet or -green with the following 

 yellow markings : upper end of mid-dorsal thoracic carina, anterior calli, 

 inter-alar dorsal area, a rather wide but isolated mesepimeral stripe, a 

 sinuous interrupted line just back of the metastigma, a fairly wide mete- 

 pimeral stripe which passes on to the metasternum and unites with its 

 fellow of the opposite side ; a narrow line along the apex of abdominal 

 segment i ; an oblique, inferior stripe each side at base of 2 ; a transverse 

 apical stripe on 2 running out inferiorly on to the posterior margin of the 

 genital lobe each side ; a triangular spot on each side of the mid-dorsal 

 line of 3, occupying the basal fourth of the segment. Conspicuous hairs 

 on the thoracic dorsum and dorsum of first two abdominal segments (pale) 

 and on the genitalia of 2 (dark). 



Legs black with the following yellowish : most of the coxae, first tro- 

 chanters, most of the first femora except near the knees, second femora 

 superiorly at base. Antero-inferior row of spines on all the femora termi- 

 nating in a longer and stouter spine. Not only do the first tibiae have the 

 inferior carina in their distal third, as described for the Cordulinae generally 

 by de Selys in 1871, but a similar pale inferior carina extends on almost 

 the entire length of the third tibiae.* The second tibiae are not carinate 

 in this manner. 



* Such a carina, which appears to be hollow within, exists on the third 

 tibiae of the males, but never of the females, of all species of Cordulinae 

 {sensu Selysii) which I have been able to examine. A similar carina is 

 found also on the second tibiae of species of Didymops, Epophthalmia, 

 Neurocordulia, etc. Its nature nnd distribution deserve special exami- 

 nation. 



