20 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.64 



Ithaca and Labrador Lake, N. Y.; Plummer Island and Camp 

 Meade, Md.; Dead Run, Va.; Algonquin, 111.; and Pullman, Wasli. 



A male from Lake Waha, Idaho, differs in having a single normal 

 vibrissa and three fronto-orbitals. The thumb-like process at the 

 apex of the genital valves is stronger than in the Eastern specimens. 

 It is left with tliis species pending the securing of additional material. 

 Possibly the Pullman record above given belongs to this race, as it 

 is based on a single female specimen. 



The name Heteroneura jiavifacies Coquillett, given in Smith's list of 

 New Jersey insects, refers to the female of this species. 



Recently Malloch has attempted to segregate from this as a dis- 

 tinct species under the name of dwplicata those forms which lack the 

 uppermost fronto-orbital and whose males possess two vibrissae. 

 The extensive series of specimens before us show that these and the 

 other characters mentioned by Malloch are variable and are not 

 correlated. In a pair from Dead Run, Va., mounted together by 

 Shannon, the male shows two fronto-orbitals, with three vibrissae 

 on one side and two on the other, while the female has tliree fronto 

 orbitals. Another male has four stout vibrissae, others show two on 

 one side and one on the other. Several specimens have three fronto- 

 orbitals on one side and two on the other. An individual may have 

 three fronto-orbitals and two vibrissae. The name dwplicata therefore 

 does not have even varietal rank. 



26. CLUSIODES (CLUSIARIA) NITIDA, new species. 



(Fig. 6.) 



Female. — Front yellow, antennae yellowish, last jomt black, 

 arista almost bare, nearly twice as long as antenna, face and cheeks 

 whitish, one vibrissa, three buccal setae, three fronto-orbitals, 

 cruciate bristles midway between the middle and front orbitals, head 

 bristles including postverticals strong and black. Thorax largely 

 piceous and shining, a conspicuous white vitta covering humeri 

 and extending to base of wing, one weak and two strong postsutural 

 dorsocentrals. Abdomen entirely black. Legs fuscous, front tarsi 

 black. Wings hyaline with two brownish spots, one on apical third 

 between fourth vem and costa, and one about posterior crossvein, 

 extending basally along fifth vein, third and fourth veins centrally 

 divergent and apically convergent, sections of costa 4.5 : 1.3 : 1, of 

 fourth vein 1.5 : 1 : 4,5, of the evanescent fifth vein 1,2 : 1; Halteres 

 white. Length 4 mm. 



Holotype. — Hill above Beulah, N. Mex., August 9, T. D. A. Cockerell 

 collector, in National Museum, Cat. No. 26263, U.S.N.M. 



Var. scutellata, new variety. A female from Boulder, Colo., also 

 collected by Dr. T. D. A. Cockerell, is similar to the preceding, but 

 the mesonotum has a large quadrate yellow spot at the base of the 



