THE CANADIAN ENTOMOLOGIST. 139 



Wings hyaline. Pterostigma luteous, on inner side and below 

 margined with fuscous ; before it, a few intercostals in anterior wings and 

 a less number in posterior, forked. Veins hairy ; costal veins luteous ; 

 the other principal longitudinal veins luteous, interrupted with fuscous at 

 junctures of transversals ; smaller longitudinal veins luteous, interrupted 

 irregularly with fuscous ; transverse veins of costal series and some of the 

 others luteous, the rest fuscous. 



Anterior wings with a series of small fuscous spots on basal portion 

 of submedian vein above, at junctures with transversals ; three larger 

 fuscous spots at intervals along the apical two-thirds of this vein ; bases 

 of a few small apical forks sometimes slightly fumose ; posterior wings a 

 little shorter than anterior, unspotted. Posterior borders of both wings 

 fringed with fine hairs. 



Male. — Length, 36 mm. ; expanse of wings, 49 mm. ; greatest width 

 of anterior wing, 6.5 mm. ; length of antenna, 6 mm. 



Antennae less clavate than in female. Abdomen one-fifth longer 

 than anterior wings ; the markings on the apical segments heavy and 

 more or less confluent ; appendages short, half as broad as long, one-half 

 length of seventh segment (viewed from below), subcylindrical, obtuse on 

 tip, luteous, sometimes clouded with, or almost entirely, fuscous ; clothed 

 with coarse black spines ; between the appendages below, a very short, 

 triangular, luteous plate. 



Type — No. 3813, U. S. National Museum. One female specimen 

 collected in San Bernardino County, California, by Mr. D. VV. Coquillett. 



No. 3813a, U. S. National Museum. One male, taken at Phoenix, 

 Arizona, June i, 1897 ; from the collection of Mr. Chas. C. Adams. 



Co-types. — One hundred and one females and seventy-two males 

 taken at Phoinix, Arizona, in June, July and August, 1897, kindly loaned 

 me for study by Mr. Chas. C. Adams, of Urbana, Illinois. 



This unusually large and fine series of specimens exhibits some 

 variations. In two of the females, and about the same number of males, 

 the face and vertex are suffused with fusco-ferruginous, so that the fuscous 

 markings are less apparent ; in a few specimens the baud on upper part 

 of face and its prolongation toward the clypeus are subobsolete ; in one 

 male the face and clypeus have scattered fuscous spots in place of the 

 usual markings. Small extra spots sometimes occur in the transverse 

 TOW on the vertex, and two short longitudinal lines or spots are some- 



