68o FAUNA HAWAIIENSIS 



Forma aptcra, %. Hawaii, Kona, one specimen at 3000 feet and two others 

 at 2000 feet, September 1892 (Perkins, Nos. 203 and 206)-; Kilauea, two, July 1895 

 (No. 531), two, August 1895 (Nos. 532 and 603), one, August 1896 (No. 656), and 

 three at 4000 feet, September 1896 (No. 695). Kauai, Mounts. Waimea, six specimens 

 at 4000 feet, June 1894 (No. 285). Koholuamano, one specimen, April 1895 (No. 

 523) and Makaweli, one at 2500 feet, February 1897. Maui, Haleakala, three 

 specimens, over 5000 feet, October 1896 (No. 636). ^. Kauai, one specimen at 

 4000 feet, October 1895 (No. 560). 



Forma macroptera, %. Oahu, Waianae Mountains, one specimen at 2000 feet, 

 April 1892 (No. 14) ; Mountains near Honolulu, two at 2300 feet, July 1900 (Nos. 667 

 and 786) and another specimen, back of Tantalus (mt.), November 1900 (No. 784). 



Oedemothrips, gen. nov. 



Surface highly polished and shining. 



Head scarcely as long as broad, slightly widened anteriorly. Antennae twice as 

 long as the head. Mouth-cone broadly rounded, reaching about three-quarters way 

 across the prosternum. Eyes small, ventrally produced posteriorly ; space between 

 them great. Ocelli absent ; post-ocular spines long. 



Wings absent. Legs moderately long and strong, fore-femur in the female very 

 slightly longer than the tibia, and fore-tarsus unarmed (e.xcepting the minute distal 

 tooth). 



Abdomen broad, lateral and sub-lateral bristles long and slender. 



Male with the prothorax and fore-femora much enlarged and inflated, fore-tibia 

 about two-thirds the length of the femur, and tarsus armed with a strong tooth. 



Species small. 



Type. Oedemothrips laticeps mihi. 



(i) Oedemothrips laticeps, sp. nov. 



Plate XVII. figs. 6—10. 



$. Length 1-5 mm., breadth of mesothorax o'375 mm. 



Colour shining black, polished ; fore-tibia red and tarsi brownish, antennae with 

 the second and third joints brownish, the third being yellow at base. Surface polished, 

 especially the prothorax, head and femora. 



The head is about as long as broad, widest across eyes ; frons raised and rounded, 

 and the cheeks, which are furnished with two or three minute setae, narrowed slightly 

 from behind the eyes to base. Eyes small and moderately finely faceted, occupying 

 laterally about one-quarter the length of the head, the space between them being about 



