272 THE CANADIAN ENTOMOLOGIST. 



EUCOREFHRA, A GENUS OF CULICID.^. 



BY D. W. COQUILLETT, WASHINGTON, D. C. 



Eucoret/ii\T, Undeiwood.* 



Intermediate between Corethrella and Sayomyia, having the antennse 

 14-jointed, as in the former, but the spaces between the verticels almost 

 bare, as in the latter; differing from each in the much shorter second joint 

 of the antenn:i3, which is only slightly longer than wide. Antennas of male 

 rather robust, submoniliform on the basal half, the first six joints only 

 slightly longer than wide, the remaining joints increasing in length and 

 decreasing in diameter toward the apex, the antepenult about half as 

 long as the penult, verticels composed of numerous very long bristly hairs 

 except on the last joint ; antennie of female nearly cylindrical, the joints 

 gradually increasing in length to the apex, scarcely thickened at the inser- 

 tion of the verticels, which consist of a few rather short bristly hairs ; 

 proboscis about one and one-half times as long as height of head, palpi 

 inserted near three-fourths of its length, 4-jointed ; first tarsal joint much 

 longer than the second ; venation as in Culex. Type, the following 

 species : 



Eucorethra Ujiderwoodi, Underwood. 



Black, the bases of antenn?e, of wings, stems of halteres, coxae, 

 femora except their broad apices, and the tibiae, yellow; thorax gray 

 pruinose and marked with three velvet black vittje, the median one 

 extending from the front end to slightly beyond the middle, and divided 

 lengthwise by a gray line, the lateral ones reaching from the hind end of 

 the mesonotum nearly to the suture ; abdomen somewhat polished, its 

 hairs yellow ; hairs of legs chiefly black, those at apices of femora and 

 tibiae golden yellow, tarsal claws of female with a single tooth near the 

 base, those of tiie male with an additional tooth near the middle ; wings 

 hyaline, a large brown cloud on veins at apices of first and second basal 

 cells, at base of second vein, of first submarginal and second posterior 

 cell, hairs of veins black, small and hind crossveins interstitial, petiole of 

 first submarginal cell three-fourths as long as that cell, petiole of second 

 l)osterior cell noticeably longer than the cell; length, 8 mm. A specimen 

 of each sex bred at Kaslo, British Columbia, June 23 and July 8, by Dr. 

 H. G. Dyar. Type, No. 6925, U. S. National Museum. 



I have also studied a feinale specimen bred March i, by Prof. W. L. 

 Underwood, of the Massachusetts Institute of Technology, after whom the 

 species is named, in recognition of his first discovery of this interesting 

 form. Prof. Underwood's specimens were obtained in the woods of 

 Maine. 



*Science, August 7th, 1903, patje 182. 



