504 PROCEEDINGS OF THE ACADEMY OF [Sept., 



Antennse longer, the flagellar segments not constricted beyond 

 the l^asal enlargement; three brown stripes on the mesonotal 

 prgescutum; male hypopygium with the ninth tergite having 

 the caudal margin deeply and broadly notched medially; 

 ninth pleurite incomplete; lobes of the caudo-lateral angles 

 of the ninth sternite not pendulous, directed entad; eighth 

 sternite without lobes on the caudal margin dietziana sp. n. 



Tipula cunctans Say. 



Tipula cuHctanfi Say; Journal of the Academj^ of Natural Sciences of Phila- 

 delphia, vol. 3, p. 23 (1823). 

 Tipula casta Loew; Entomologische Zeitschrift, vol. 7, p. 289 (1863). 

 Tipula infuscata Loew; Entomologische Zeitschrift, vol. 7, p. 289 (1863). 



There can be no doubt but that the three names given above 

 represent one and the same species. Under the series of cunctans 

 determined as such by Loew, there appears a specimen which bears 

 a manuscript label in Loew's writing and this label is ''infuscata." 

 The type-series of casta and infuscata, as well as the series of cunctans, 

 all bear the same manuscript number given to the specimens by 

 Osten Sacken (No. 95). In the series of Tipula cunctans there are 

 two females dated October 20; it is well known that infuscata is one 

 of the few autumnal species of Nearctic Tipula, and this data in 

 regard to cunctans only confirms the synonomy of the species. 



The Bicornis Group. 



The small group of species that constitute this division seem to 

 show the following characters and tendencies: The nasus is very 

 short to indistinct; the coloration is yellow or brownish yellow 

 with the thoracic stripes usually distinct; the body is provided with 

 abundant short hairs on the head and on the thoracic interspaces. 

 The venation shows the cell 1st Mo very small and pentagonal (larger 

 and more elongated in johnsoniana) . The male hypopygium has 

 the ninth tergite tumid (very slightly so in parshleyi), unarmed or 

 provided with horns (unarmed in johnsoniana; two horns in bicornis 

 and morrisoni; four horns in rnegaura); the ninth pleurite com- 

 plete; the outer pleural appendage tending to be reduced to a 

 very tiny lobe; the inner pleural appendage large, elongate to 

 subquadrate; the gonapophyses subtending the penis-guard, and 

 about half its length (in morrisoni, megaura, etc.) to fully the length 

 of the penis-guard (in johnsoniana) . The female ovipositor with the 

 valves short, blimt and subfleshy, little chitinized. Our species 

 may be separated in the male sex by the following key : 



1. Ninth tergite not tumid; eighth sternite very long, sheathing the 

 ninth sternite beneath, the tip with two chitinized points on 

 each side parshleyi sp. n. 



