390 



THE CANA.DIAN ENTOI.IOLOGIST. 



cylindrical, enlarging litth or none toward base, and witli distinct flange 

 at apex. The cauda is very peculiar in form, is directed up and back, and 

 is modf rately broad at the base, but soon becomes small, tapering and 

 crooked, appearing as if it had been twisted off. (Fig. 4.) Beneath the 

 Cauda the anal plate is protruded into a blunt point projecting back and 

 ventrally, and appearing, often, more like the ordinary blunt conical cauda 

 than does the real cauda. I have not seen a similar cauda in any other 

 species. Beak long, much surpassing hind coxce, the third joint long and 

 slender. 



Winged Viviparous Female. 



Specimens taken by L. C. Bragg at Longmont on June 14, '07, 

 Differs little from the apterous form; the cauda is somewhat straighter 

 and more symmetrical, wings rather stout, 4 mm. long, with subcostal 

 nervure and stigma rusty-brown. Length of body about 3.4 mm., antenna 

 much shorter, about 2.10 mm. joints: III .6r, IV .43, V .31, VI .14, 

 VII .49 mm.; cornicles, .50 mm. 



Winged Afale. 



Same date and i)lace as the preceding females. 



Colours as in the winged females. Length of body, 2.70 mm.; 

 antenna, 2.40 mm.; cornicles, .54 mm. .Vntenna joints: III .65, IV .42, 

 V .40, VI .13, VII .50 mm. Joints 3 and 4 strongly tuberculate, the 

 former with about 40, and the latter with a single row of about ten small 

 circular sensoria. Cornicles cylindrical, black. Cauda as in the alate 

 female. Slight antennal tubercles. 



Apterous Oviparous Female. 



From specimens taken at Fort Collins, Oct. 27, '07. 



Colour as in viviparous apterous form, except that the anal i)lates are 

 cons])icuously black. 



Length, 2.5 mm. long by 1.35 mm, broad. Antenna, i.S mm. 

 Joints: III .50, IV .36, V .30, VI .13, VII .43 mm. On joint 3 

 are a small number, about 15 to 25, circular, slightly tuberculate sensoria. 

 The Cauda is small, pointed, black, upturned, and does not show the 

 peculiar twisted appearance as well as in the viviparous females. Beak 

 reaches considerably beyond hind coxte. Cornicles, .40 mm. Several 

 ;]iecimens taken in copula. They are much smnller than the viviparnus 

 females. Oviparous females and males quite numerous, but I find no 

 eggs yet. There are many ant attendants. 



