1912] Alexander — New Nearctic Tipulidae (Diptera) 165 



Abdomen greyish on dorsum, pleurse darker, blackish; sternum testaceous. 

 Holotype. cf , Roger's Pass, British Columbia; July 30, 1908. (J. Chester Brad- 

 ley, coll.) 



Type in Cornell Univ. coll. 



This species agrees with the other American species, clausa O. S. 

 of Cahfornia, in its possessing a median cross-vein. It differs in 

 the entire absence of a stigmal spot. I have seen the types of 

 clausa in Cambridge, thanks to the kindness of Mr. Henshaw, and 

 find that that portion of Ri, just underneath the stigma is bent 

 caudad, and, beyond the stigma, regains its former level; no such 

 condition exists in astigmatica. 



Erioptera {Mesocy phono) distincta sp. nov. 



Vertex variegated; meson otum clear light grey; dorsal stripes rather broad, 

 clear; pleural stripes very distinct, clear-cut; femora with two dark bands, except- 

 ing the middle pair which has one; wings greyish, spotted and dotted, on the veins 

 and in the cells, with white. 



cf. Length, 3.6 — 3.8 mm.; wing, 4.6 mm. " 



Head: palpi brown; antennae light yellowish-brown; vertex with a large, clear 

 grey, oval spot, surrounded by a brown border; the outer margins of the vertex, 

 nearest the eyes, fawn-colored; occiput dark brown. Cervical sclerites pale yellow, 

 dorsally with two dark spots. 



Thorax: pronotum whitish, the scutellum interrupted medially with a dark pit; 

 mesonotum, prsescutum clear light grey, the lateral margins narrowly greyish; a 

 brown stripe on either side, beginning near the caudal end of the pronotum, con- 

 tinuing backward; a brown stripe on either side of the grey median vitta. Pseudo 

 sutural pitsi elongate-oval, pale; the space anterior to this fovea is pale, fawn- 

 colored; prsescutal, or tuberculate, pits, distinct, black, separated from one another 

 by a distance equal to one and one-half the diameter of one; these pits are located 

 in the median ground stripe near the proximal edge of the dark dorsal stripes; 

 scutum, greyish, the \-itt8e of the prsescutum continued backward onto this; scu- 

 tellum light yellowish-brown, darker anteriorly; post-notum grey, tri-vittate with 

 dark brown. Pleurae dark brown; a narrow yellowish- white pale stripe running 

 from the lateral margin of the cervical sclerites, caudad; broadening out above the 

 fore coxa and continuing to the wing basis; a broad, clear, silvery -white stripe, 

 narrowest anteriorly, beginning back of the fore coxa, running back to the base of 

 the abdomen; sternum clear grey. The pleura has the appearance of having three 

 dark and two pale bands. Halteres, stem white, knob pale brown. Legs: fore and 

 hind femur, yellow with a broad sub-basal, and a narrower, sub-apical, browTiish- 

 black ring; tibiae and tarsi whitish; extreme tarsal segments darker; middle leg, 

 similar, but femur has only the sub-apical dark band. 



Wings greyish, browner on the cephalic half, with numerous white spots and 

 dots, these largest along the costa and on the cord; the cells are speckled with 

 numerous fine dots. 



