28 Annals Entomological Society of America [Vol. XII, 



Two males from Olaa, Hawaii, altitude 2500 feet (W. H. 

 Ashmead), in the collection of the U. S. Nat. Museum. 



Dicranomyia hawaiiensis Grimsh. 



This beautiful Dicranomyia is widely distributed in the 

 Islands. The following additional records of distribution are 

 available. Island of Oahu: Honolulu, February 7, 1913 

 (O. H. Swezey); Palolo, February 8, 1914 (O. H. Swezey) ; 

 Olympus, September 8, 1912 (O. H. Swezey); Waianae Moun- 

 tains, altitude 2000 feet, March 5, 1917 (J. F. Illingworth) . 



Dicranomyia foliocuniculator Swez. 



This recently described species is apparently common and 

 widely distributed in the Islands. As stated before, it is unique 

 in the leaf -mining habits of the larva, a habitat that will prob- 

 ably be found to be shared by other species of the Islands, 

 especially D. jacobus, D. swezeyi, etc., forms that are undoubtedly 

 related to D. foliocuniculator. 



Numerous specimens are available from the Waianae 

 Mountains, Oahu, altitude 2000 feet, March 5, 1917 (J. F. 

 Illingworth) associated with D. hawaiiensis, D. stygipennis, etc. 

 This locality has been mentioned in the introductory paragraph 

 of this article. Waimano, Oahu, January 5, 1913, (O. H. 

 Swezey). lao Valley, Maui, altitude 700 feet, January 3, 1914 

 (J. F. Illingworth). 



Dicranomyia jacobus, sp. n. 



Size larger than in foliocuniculator (length of the male over 4 mm.) ; 

 coloration of the body darker brown; wings with a decided brownish 

 tinge. 



Male: Length, 4.3-4.4 mm.; wing, 5.2-5.5 mm. 



Female: Length, 5.1-6.5 mm.;' wing, 5.S-6.2 mm. 



Rostrum and palpi dark brownish black. Antennae rather short, 

 dark brownish black, the flagellar segments short, suboval to rounded, 

 the apical segments more elongated. Head dark brown. 



Neck rather elongated. Thorax very high and gibbous, dark brown, 

 without stripes (in alcohol). Halteres rather short, the knobs large, 

 the stem pale, the knobs darker, brown. Legs with the coxae and tro- 

 chanters brown; remainder of the legs rather dark brown. Wings 

 light brown, the stigma indistinct, only a little darker than the remain- 

 der of the wings; veins dark brown. Venation: Sc sh'ort, Sci ending 

 about opposite or slightly beyond the origin of Rs; Sc^ removed from the 

 tip of Sci for a distance about equal to cross- vein r; Rs long, somewhat 

 arcuated, from two to three times as long as the basal deflection of 

 i?4+5; cell 1st M2 large, as long as the veins issuing from it; basal deflec- 

 tion of Cui just before, at, or even slightly beyond, the fork of M. 



