68 Fritz Johansen and I. C. Nielsen. The Insects of the "Danmark" Expedition. 



not been found in East Greenland; on the other hand, it is common 

 in West Greenland. 



2. Chlamydatus pulicarius Fall. 



Some small Hemiptera larvæ, which probably belong to this 

 species were found on Potentilla June — July. 



3. Aphis sp. 



A single specimen of a small leaf-louse, which contained a para- 

 sitic wasp, was found, as mentioned already, attached to a stone. 

 Beside these some green apterous Aphidæ were found on an Epilo- 

 biiim 4i 08. 



Siphunculata. 



Haematopinus trichechi Boh. 



In August 1906 a walrus was shot and the flesh cut up to serve 

 as food for the dogs in winter; when the skin was brought out to 

 be used in the spring of 1907, a score of living specimens of 

 H. trichechi were found in the inner part of the nipples. 



EXPLANATION OF THE FIGURES. 



Plate YII. 



Fig. 1. Tipiila arctica. Larva. The front part of the head from ahove. a antennae, 



b sense-process, с sense-organ, d chitinous ridge, 

 e bristles. 



— 2. — — — Mandible, a prostheca. 



— 3. — — — Maxillary palp, a sense-process, b sense-organ. 



— 4. — — — Ectolabium. 



— 5. — — — Endolabium. 



— 6. — — — Hind end. 



— 7. — - Pupa. 



— 8. Culex nigripes. Larva. The head. 



Plate Till. 



^ 1). Culex nigripes. Larva. The two last segments 



— 10. — — Spinous row from the under side of the air-tube. 



— 11. Pcleina stijlata. Larva in 3rd stage. Mouth-hooks and pharyngeal skeleton. 



a mouth-hooks, b the anterior pharyngeal plates, с the 

 upper pharyngeal plates, d the lower. 



— 12. — — Anterior spiracle. 



— 13. — — Posterior spiracle. 



— 14. Undetermined lepidopterous larva. 



17 — 1-191Ü. 



