UNDESCEIBED SPECIES OF COSTA RICAN FLIES BE- 

 LONGING TO THE FAMILY TIPULIDAE IN THE 

 UNITED STATES NATIONAL MUSEUM. 



By Charles P. Alexander, 

 Of the Illinois State Natural History Survei/. 



The following new species of crane-flies were included in an exten- 

 sive collection of these insects taken by Senor A. Alfaro and sent to 

 me for naming through the kindness of Dr. H. G. Dyar. The species 

 of Adel'phoinyia extends the range of this interesting genus into the 

 Neotropical Region. The new Microtipula^ on the other hand, is 

 the first species of this genus to be discovered north of Panama. The 

 writer is indebted to Seiior Alfaro and the authorities of the United 

 States National Museum for the privilege of studying these very 

 valuable collections. As indicated in the title, the types of all the 

 novelties are preserved in the National Collection. 



DICRANOMYIA PAMPOECILA, new species. 



General coloration gray, variegated with dark brown; legs 3'^el- 

 lowish, the femora with a broad brown subterminal ring; wings 

 subhyaline, reticulated with brown and brownish gray, this including 

 conspicuous larger blotches at the wing-base, origin of Rs^ at stigma 

 and the end of vein -B21-3; vein Sc long. 



Female. — Length 6 mm. ; wing 6.6 mm. 



Rostrum about one-half the length of the head, dark brownish 

 black; palpi dark brown. Antennae with the basal segment dark 

 brown; second scapal segment and basal segments of the flagellum 

 brownish yellow, the distal flagellar segments passing into brown. 

 Head brown. 



Mesonotal praescutmn broadly brownish gray medially with two 

 small black dots near two-thirds the length of the sclerite; lateral 

 margins of the praescutum reddish, behind near the suture with a 

 ring-like black marking; scutum gray, each lobe with a darker ring- 

 like mark ; scutellum gray with two basal black spots ; postnotum dark 

 brown on the posterior two-thirds, the basal third silvery pruinose. 

 Pleura light brown, gray pruinose, variegated with brown. Halteres 

 short, yellowish, the knobs dark brown. Legs with the coxae gray 

 pruinose, variegated with brown; trochanters yellow; femora brown- 

 ish yellow with a broad subterminal brown ring; tibiae and tarsi pale 



No, 2420— Proceedings U. S. National Museum, Vol. 60, Art. 25. 



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