124 NORTH AMERICAN TIPULIDAE 



the preceding joints. Face, under side of head and postocular spaces pale- 

 yellowish. Basal joint of antennae yellow, remainder dark brown, joints 

 cylindroidal, setae of basal whorls long, blackish. Occiput orange-yellow, with 

 large, broadly triangular, shining spot. 



Thorax pale yellow. Lateral portion of praenotal scutum brown. Prae- 

 scutum and scutum as in P. calinota, but the black, velvety spot at the ante- 

 rior end of the lateral stripe is larger, the stripes ferruginous, not pollinose, and 

 the scutum is without the median black spot. Scuteilum lustrous, ferruginous, 

 with median black stripe. Postnotum opaque, pale yellow on the sides, 

 ocherous posteriorly, with a large, square, shining black spot anteriorly. 

 Pleura concolorous; inferior portion of mesopleura dark brown anteriorly, 

 ferruginous behind; mesopleural suture black; metapleura conspicuously in 

 front, less so behind, and lower angle of ptero-pleura, dark brown. Halteres 

 pale yellowish, knob fuscous. Legs slender, brownish-yellow, outer half of 

 femora blackish, tibiae infuscate towards the apex, shorter than the metatarsi, 

 outer tarsal joints fuscous; pubescence very short, blackish. Wings hyaline, 

 costal cell concolorous, cell Sc pale yellow, basal portion of vein R 4 and 5 , cross- 

 vein R-M and apex of wing infuscate; veins C, Sc and R almost impercepti- 

 bly setulose. Venation PL IV, fig. 8. 



Abdominal tergum lemon-yellow, base white, a broad dorsal stripe, less 

 distinct posteriorly and expanding into a transverse fascia on the posterior 

 part of the tergites, dark fuscous; lateral margin of tergites edged with fuscous. 

 Venter whitish, tinted and speckled with fuscous. Ovipositor ferruginous, 

 dorsal valves long and slender, ventral valves a little wider, acutely pointed 

 and scarcely one-half the length of the dorsal valves. 



Holotype: 9 ; Black Mountains, North Carolina. June, 1912. 

 (Wm. Beutenmueller.) 



For differentiation from allied forms, see under P. calinota. 



Pachyrhina evasa spec. n. (PL IV, fig. 10.) 



Yellow. Antennae entirely yellowish; occiput with shining triangular 

 spot. Abdominal tergites margined posteriorly with yellowish-brown. Thorax 

 similar to P. montana. 



Female. Length, 18 mm.; wing, 13.5 mm. 



Frontal prolongation brown anteriorly. Mouth parts and palpi yellow, 

 last joint of the latter much longer than the three preceding joints. Antennae 

 dark yellow, basal joint a shade paler, outer joints slightly infuscate, verticels 

 of pale yellow setae and distinctly shorter than in P. montana. Head other- 

 wise as in the last named species. 



Thorax pale yellow. Sides of pronotal scutum dark fuscous. Praescutal 

 stripes ferruginous, the median stripe black in middle half, no pruinosity. 

 Velvety black spot of lateral stripes large. Scutellum ferruginous, shining. 

 Postnotum pale ocherous, subopaque, blackish posteriorly. Outer part of 

 transverse suture and ante-alar part of pleura-dorsal suture, black. Pleura 

 concolorous; intercoxal part of sternopleura and lower portion of mesopleura 

 ocherous, a spot in the pleura-dorsal suture posteriorly and spot of mesosternum 



