64 MAINK AGRTCiaTURAI KXPKRIMHNT STATION. IQI2. 



of tlie hind femora, and the tarsi except their bases, brown. 

 Third joint of antennre nearly twice as long as wide, the follow- 

 ing joints becoming successively shorter to the fourreenth wdiich 

 is as wide as long; first joint slightly longer than wide, the 

 second as wide as long. Body grayish prninose, the hairs and 

 bristles yellowish. Wings hyaline, the apex from a short dis- 

 tance before the apex of Ri to tip of Cu= and a cloud below 

 the latter, dark gray; Sc attenuated toward its apex, becoming 

 obsolete slightly beyond middle of basal cell R, Rs strongly 

 bowed toward Ri; media forks at 1-3 of distance from the 

 crossvein to the forking of the cubitus. "San Mateo Co., Cal." 



2. Tcliiiaj)liilus iicbiilosa n. sp. 

 Male and female. Length 2.5. Similar to the foregoing but 

 ■dififering as follows: Underside of each femur without dark 

 streak; apical wing cloud begins at the apex of Ri; Rs not 

 strongly bowed toward Ri (Fig. 158) ; fore metatarsus and 

 tibia subequal; hypopygium (Fig. 30) black. Hampton, N. H. 

 (S. A. Shaw), April; Ithaca, N. Y. ! April, t 



^' 2'"-). Genus Bxccliia Winnertz. t 

 Verb. Zool.-bot. Ges. Wien. XIII. 87971863. 



Lateral ocelli closely contiguous to the eye margin; middle 

 ocellus, when present, placed in a groove on the front (Fig. 6y 

 in Part I). Legs long and slender, fore metatarsus subequal 

 or slightly longer than the tibia, rarely much shorter; tibial 

 sets delicate (Fig. 62, Part I); posterior basal seta of hind 

 coxae present. Subcostal vein very short, incomplete or ending 

 in Ri ; costal vein does not extend beyond the tip of the radial 

 sector ; media fork proximad of the basal section of the radial 

 sector, or rarely directly under it; cubitus forks distad of the 

 fork of the media; its branches widely divergent. 



The larvcX, which are frequently found in fungi, do not have 

 transverse rows of ambulacral setul?e. 



Owing to the great similarity of the members of this genus, 

 and the fre(iuent though slight variation of the wing venation 

 and coloration in individuals of the same species as demon- 

 strated in bree('ing experiments, I am only able to give a table 

 to the males based largely upon the form of the hy])opygic-.. 

 I'or brevity the first segment of R< measured from the humora". 

 crossvein is designated as a. the second segment, h. 



