20G Mr. F. W. Edwards on 



Psectrocladius limbatellus (Holmgren). 



Synonyms : Chironomtis limbatellus, Holmgren ; ? Psectrocladius 

 stratiotis, Kieffer. 



Spitsbergen : Bruce City, head of Klaas Billeu Bay, 

 19. vii. aud 14. viii. 1921 ; 0-50 ft., on shingle of raised 

 beach, and on hut-window; 206 c? , 43 ? . 



This is considerably smaller than P. borealis; the male 

 with lighter thoracic ground-colour, differently constructed 

 antennae, and no beard on the front tarsi. The pulvilli are 

 well marked, being more than half as long as the claws. 

 The agreement with Holmgren's C. limbatellus seems suffi- 

 ciently close, but it should be noted that the head of the 

 male is darker tlian that of the female, often almost black, 

 and that the cubital fork is longer in the female than in the 

 male. Structurally the species seems almost identical with 

 P. stratiotis, Kieff., as redescribed by Goetghebuer, but 

 according to this author the terminal segment of the male 

 antennae is one-third longer than segments 2-13 together, 

 whereas in the Spitsbergen specimens it is more than half 

 as long again. I have, however, seen British specimens, 

 probably referable to P. stratiotis, which I can hardly dis- 

 tinguish from those from Spitsbergen. 



Orthocladius consobrinus (Holmgren). 



Spitsbergen : Cape Boheman, N. side of Ice Fjord, 

 16. vii. 1921 ; flying over wet tundra near ponds ; Q ^ y\ ? . 

 Bruce City, head of Klaas Billen Bay, 19. vii. 1921 ; round 

 huts, on shingle of raised beach ; 2 S • 



Prince Charles' Foreland: N.E. of island, 3. vii. 1921; 

 c. 40 ft., on tundra of raised beach ; 7 S • 



This species is remarkable for the well-developed tarsal 

 beard of the male. In this character, as well as in size and 

 colour, it bears a superficial resemblance to Psectrocladius 

 borealis^ but, apart from the generic character of the absence 

 of pulvilli, it differs from P. borealis in the milk-white wings 

 and in the clearer yellow colour of the halteres. Holmgren 

 mentions these two last points, thus establishing the fact 

 that this, and not P. borealis, was the species which he had. 

 before him. Kieffer refers C. consobrinus to Camptocladius, 

 but this is surely an error ; the size is considerably larger 

 than any known Camptocladius, and Cu^ is only very slightly 

 curved, as usual in Orthocladius. The terminal segment of 

 the flagellum of the male antennae is fully twice as long as 

 the remaining segments together, these being much broader 



