1886.] 285 [Hagen. 



though no appendages are produced the specimen must be a male. 



Hab. Only one specimen from Denver, Colorado. 



It is a remarkable fact, that the three prominent species of Eu- 

 rope are represented in N. America ; one of them M. angulatus is 

 perfectly identical with the N. American species ; the second, M. 

 paganus, is so very near M. montanus, that only the appendages 

 of the male show a sure structural difference ; if a similar variation 

 can be shown in European specimens, M. montanus would have to 

 be considered as a race of M. paganus. The third, M. variegatus, 

 differs somewhat more from the N. American species, of which 

 only one specimen is known. One of the most striking characters 

 of M. variegatus (in 19 specimens before me) the coal black glossy 

 face is not mentioned by M'Lachlan and Wallengren, and Stephens, 

 111., sa} r s also, deep fuscous, head very glossy in front. The only 

 English specimen before me, though apparently young, has also the 

 front brownish. It is desirable to know if the English and Swedish 

 specimens never have a black face. But I believe that M. vario- 

 losus shows more differences. The antennae are shorter, the first 

 joint yellow above ; the small black tubercles on head and thorax 

 are not to be found on twenty European specimens ; the wings are 

 narrower, and the venation shows more elongated cells. There 

 are more American specimens needed and the knowledge of the 

 male appendages to make this species beyond doubt. At all 

 events it differs much more from M. variegatus than M. montanus 

 does from its European relative. 



8. Micronms insipidus. 



Micromus insipidus 9 Hag., Syn. N. Am. Neur.,p. 199, no. 4. 

 Micromus sobrius $ Hag., ibid, 199, no. 5. 



Long. c. al. 7 to 10 mm. ; exp. al. 14 to 18 mm. 



Head fuscous, with some pale villosity ; front paler, luteous ; 

 palpi pale ; antennae yellow, the two basal joints marked with 

 fuscous ; thorax and abdomen fuscous ; legs pale, four anterior 

 tibiae with two fuscous rings ; tarsi yellowish ; front wings 

 slightly pilose, less than three times as long as broad, apex ellip- 

 tical ; hyaline, very little fumose, densely mottled with fuscous 

 spots, forming in the apical half and along the hind border some 

 waved, maculose, transverse bands ; veins pilose, pale, with many 

 fuscous interruptions ; four sectors ; series of dark, gradate veins, 

 oblique, about parallel ; six external gradate, of which the second 



