Vol. XXVl] ENTOMOLOGICAL NEWS 29 



A Second Bromeliad-Inhabiting Crane-fly (Tipulidae, 



Diptera). 



By CHARLES P. ALEXANDER, Ithaca, New York.* 

 In ENTOMOLOGICAL NEWS for November, 1912, the author 

 described, as Mongoma bromdiadicola, a Costa Rican crane- 

 fly that had been bred by Mr. Picado from larvae dwelling in 

 the water of bromeliaceous plants. Since that article was 

 written, specimens of a second species, allied to AI. bromdiadi- 

 cola, have been received from the U. S. National Museum 

 through the kindness of Mr. Frederick Knab, and this species 

 is characterized in this article. 



Mongoma leucoxena sp. n. 



Cross-vein r just before the fork of /?2 plus 3; wings suhhyaline 

 with the tip a little darkened ; legs black with the tip of the femur 

 and the base and tip of the tibia white ; all the tarsi white. 



Male. Length, about 9.8 mm. ; wing, 8 mm. 



Female. Length, 10.4 mm.; wing, 8.8 mm. Fore leg, femur, 11.3 

 mm.; tibia, 12.3 mm.; tarsus, 10 mm. Middle leg, femur, 12 mm.; 

 tibia, 11.3 mm.; tarsus, 8.9 mm. Hind leg, femur, 12 mm.; tibia, 11.4 

 mm. ; tarsus, 7.7 mm. 



Rostrum and palpi brownish black. Antennae rather long, dark 

 brown ; the flagellar segments elongate oval. Head light fawn yellow 

 with an elongate dark brown mark on either side of the vertex. 



Thoracic praescutum yellowish brown with three reddish brown 

 stripes, the median one narrower, darkest behind, indistinct in front; 

 lateral stripes indistinct. Scutum with the lobes reddish brown, the 

 median space paler. Scutellum and postnotum reddish brown. Pleurae 

 dull yellow, more reddish on the dorsal mesopleurites before the wing 

 root. 



Halteres rather short, dark brown, pale at the base. 



Legs, fore pair, coxae and trochanters dull yellow, femora brownish 

 black with the tip broadly white, tibia with a white basal annulus sub- 

 equal in width to the femoral ring, apical third of the tibia white, re- 

 mainder dark brown, tarsi white, claws brown; middle and hind legs 

 similar but the white tibial apex rather narrower including about two- 

 sevenths of the segment. 



Wing subhyaline or nearly so, iridescent, the tip slightly darkened; 

 stigma rounded dark brown ; veins dark brown. Venation : Cross- 



*Contribution from the Entomological Department -of Cornell Uni- 

 versity. 



