360 DIPTEROUS GENUS TIPULA 



Wings: white area beyond the stigma more pronounced; outer part of 

 second submarginal and first posterior cells, and a basal spot in second 

 and third posterior cells, whitish. 



Holotype: cf; Kurakuck Country, 110 miles N. E. of Nome, 

 Alaska. August 19, 1913. (August Kusche.) 



Allotype: 9 ; same locality, etc. 



Paratype: cf ; same locality, etc. 



All three specimens in my collection are defective. The gen- 

 eral appearance of the insect is dusky. This species, aside from 

 sexual characters, is distinguished from the others of the group 

 by the relatively wide and almost unicolorous wings. 



Tipula criddlei spec. n. (Plate XIII, figs. 16 and 17; plate XIV, fig. 7.) 



Color, yellowish gray; wing markings distinct. Lateral appendages 

 with three processes, the upper process ends in two small subequal teeth. 



cf, Length, 11 mm.; wing, 13.5 mm. 



Middle leg: femur, 7 mm., tibia, 9.5 mm., tarsus, 13.5 mm. 



Head yellow; occiput gray with median fuscous line and short black 

 hairs each side behind the eyes. Face and adjacent part of rostrum pale 

 yellow. Rostrum yellow, testaceous above; nasus pale fuscous with short 

 black hairs. Palpi yellowish fuscous with blackish, scattered hairs; first 

 joint short, joints two and three equal, the former thickened outwardly, 

 joints one to three pale at base, the fourth joint scarcely as long as the 

 preceding three joints. Antennae slender, bent back they reach the scu- 

 tellum; scape yellow, flagellum dark brown, finely pubescent, segments 

 very little thicker at base and beyond the middle, each with four or five 

 rather long basal bristles. 



Thorax grayish fuscous. Collare sordid yellowish with transverse me- 

 dian fuscous patch and a very conspicuous blackish spot at each side be- 

 hind the neck, a fuscous line extending from the neck upon the collare. 

 Mesonotum grayish fuscous, the lateral stripes concolorous, margined with 

 fuscous, the outer margin deficient near the base; the median stripe fus- 

 cous, narrowed posteriorly, the median dividing line widened rapidly at 

 beginning of middle third; the interstices between the stripes not at all 

 hairy; behind the suture are four incomplete annular fuscous spots, the 

 middle ones distinctly larger than the outer. Scutellum and metanotum 

 gray with fine median fuscous line. Dorso-pleural membrane pale yel- 

 lowish. Meso- and sterno-pleura and lower part of pteropleura grayish 

 fuscous, rest of pleura yellowish, with a grayish white bloom. Knob of 

 halters brown, stem pale fuscous, base pale. 



Abdomen testaceous tinged with fuscous, posterior margin of segments 

 2 to 7 paler; venter infuscate along the middle; tergum somewhat darker, 

 the very distinct blackish brown dorsal stripe becomes obsolete on tergites 

 6 and 7; the lateral fuscous stripes almost obsolete, lateral margins of ter- 



