186 PROCEEDINOS OF THE NATIONAL MV8EUM. vol.4?.. 



becoming shallow and resembling reticulations and on the inflexed 

 sides of pronotum disappearing entirely; scutellum brownzy and 

 with the punctures elongate so that it appears somewhat longitudi- 

 nally striate-punctate; propodeum with a median carina and with 

 lateral folds not very apparent, the inner margins each with a delicate 

 carina; prepectus with thimble-like punctures, anterior portion of 

 mesopleume with similar but more shallow punctures, posterior half 

 above, smooth, below indistinctly reticulated; legs, including coxae, 

 whitish-testaceous; wings hyaline, marginal vein longer than sub- 

 marginal, about two and one-half times as long as postmarginal and 

 nearly four times as long as stigmal; petiole extending slightly beyond 

 apex of neck of propodeum. 



Male. — Length about 1.25 mm. Similar to the female; antennae 

 with three branches reaching almost to tip of club; sculpture of 

 scutellum more distinctly longitudinal than in female; petiole some- 

 what longer than in female, testaceous; abdomen with a flavous spot 

 near base. 



Habitat. — Fort Collins, Colorado. 



Two females (one without abdomen) with the data reared from 

 mines in Agropyron, C. N. Ainslie collector (Webster No. 6611). The 

 note accompanying them stated that the mines were those of a species 

 of Agromyza. 



Type.— C&t. No. 14522, U.S.N.M. 



The species is named after the collector. 



This species differs from N. coUaris Ashmead in having the head 

 without thimble-like punctures. 



Genus COMEDO Schrank. 



This name must be used instead of Cratotechus Thomson which is 

 isogenotypic with Schrank' s genus. 



TABLE OP FEMALES OP THE SPECIES FOUND IN THE UNITED STATES. 



1. Legs, except coxae, pale 5. 



Legs with the femora dark colored 2. 



2. Club of antenuse dark colored hookeri Crawford. 



Club of anteniifB, except at times the base, whitish 3 



3. Blue-green, median lobe of mesoscutum shallowly subreticulated, the reticulations 



at the rear twice as large as those anteriorly koeheJei Crawford. 



Aeneous, or bronzy greenish, the middle lobe of mesoscutum with thimble-like 

 punctures, the punctures at the rear never much larger than these anteriorly. 4. 



4. Wings with a deep infuscation; median carina of propodeum greatly elevated; 



truncation laterad of lateral folds reticulate; area between propodeal spiracles and 



lateral folds punctured ; male antennse simple anom ocerus Crawford . 



Wings lightly infuscated; median carina of propodeum not greatly elevated; 

 declivity laterad of folds of propodeum smooth; area between folds and spiracles 

 mostly smooth; male antennse with three hranches.brevicapitahis Cook and Davis. 



5. Lateral carinse of propodeum distinct; abdomen of female without a flavous 



spot smerinthi Ashmead. 



Lateral carinae of propodeum not distinct; abdomen of Jemale with a large flavous 

 spot orgyix Fitch. 



