THE SAWFLLES OF BOULDER COUNTY, COLORADO 97 



species are said to feed on sweet potato, and the third was very common in the wheat- 

 fields in the fall of 1911. It is very probable that the last mentioned species feeds on 

 some weed which grows among the wheat plants. 



Three species have been taken in Boulder County and it is probable that one or 

 two more may be found there. The species are more southern in distribution and will 

 probably be found to be more abundant in the Transition and Austral life-zones. 



Genus STERICTIPHORA Billberg 



(6) S. abdominalis (Cresson). Length 6 mm. Black; pronotum, abdomen except 

 apex rufo-ferruginous; anterior tibiae and tarsi, and intermediate tibiae beneath pallid; 

 wings subhyaline, venation black. 



Male collected Boulder, Colorado, August 18, 191 1, by Hester M. Rohwer. 



(7) S. collaris (Rohwer). Length 4 mm. Black; pronotum sides of prescutum, 

 and side of abdomen reddish-yellow; four anterior tibiae and tarsi and base of hind 

 tibiae pallid; wings iridescent, hyaline slightly dusky; venation pale brown. 



Female; Boulder, Colorado, August 1, 1908 (S. A. Rohwer). 



(8) S. lineata (Rohwer). Length 5 mm. Black; pronotum, mesoscutum, meso- 

 prescutum except a spot in the middle and sides of abdomen reddish-yellow; four anterior 

 tibiae and tarsi and base of hind tibiae pallid; wings iridescent, hyaline slightly dusky; 

 venation dark brown. 



Female; Boulder, Colorado, August 18, 1911, collected by Hester M. Rohwer. 



Family DIPRIONIDAE 



Abdomen not sharply angled laterally; antennae many jointed, serrate in female, 

 pectinate in male; sternauli (a suture separating the mesoepisternum from the meso- 

 sternum) wanting; posterior coxae contiguous, or nearly so; mesopimeron divided into 

 two plates, the dorsal one sculptured similar to the mesoepisternum; proepisternum 

 not divided into two plates; radial cell of fore wings without a cross- vein; costal cell of 

 fore wings large; anal cell of fore wings contracted or with a cross- vein. 



Genus DLPRION Schrank 

 Malar space wanting; antennae of male biramose; serrate in female; lanceolate 

 cell of fore wings with a cross-vein. 



Larvae gregarious, feeding on conifers. 



(9) D. hypomelas (Rohwer). Length 5.5 mm. Black; labrum, apex of mandibles 

 extreme apex of abdomen dusky reddish; venter very dark piceous; tegulae at the extreme 

 base luteous; palpi pallid; legs except bases of four posterior coxae, and all of the anterior 

 coxae, pale luteous; wings clear hyaline; venation brown. Hypopygidium broadly 

 oval, with distinct rather sparse punctures. Female unknown. 



Ward, Boulder County, Colorado, August 30, 1899 ("O.B. "). (Type locality.) 



Family TENTHREDINIDAE 



Abdomen not sharply angled laterally; stemauli (a suture separating the mesoepi- 

 sternum from the mesosternum) wanting; posterior coxae contiguous or nearly so; 

 mesoepimeron not divided into two plates; proepisternum divided into two plates; anten- 



