124 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



12. Frontal crest slightly broken; ocellar basin with rounded 

 walls; median fovea elongate; saw-guides tapering on 

 both edges, somewhat angularly, to an obtuse tip, smooth, 

 margined with very short, scattering hairs; body light 

 yellowish or reddish, with the antennae above black; tips of 



hind tibiae and their tarsi infuscated. Length 7 mm brunneus 



Frontal crest distinct and unbroken; ocellar basin with wide, 

 rounded walls; median fovea circular, with branches ex- 

 tending over bases of antennae; saw-guides tapering, ob- 

 tusely pointed, clothed with short and rather dense hairs; 

 body resinous yellow, thorax and head reddish; antennae, 

 ring about ocelli, and postscutellum black. Length 6 mm. 



dyari 



*A. concolor (Norton). Nematus concolor Norton. Nematus 

 violaceipennis Norton. Farmington (E. N.). 

 °A. comstocki Marlatt. 

 °A. gracilis Marlatt. 



°A. similis Marlatt. Larva feeds on willow. 

 °A. cooki Marlatt. 

 °A. rufipes Marlatt. 

 °A. azalea Marlatt. Larva feeds on Azalea. 



A. fulvipes (Norton). Nematus fulvipes Morion. Connecti- 

 cut (E. N.). 



A. luteotergum (Norton). Nematus luteotergum Norton. 

 Larva feeds on alder. Connecticut (E. N.). 



A. lineatus (Harrington). Nematus lineatus Harrington. 



A. brunneus (Norton.) Nematus brunneus Norton. 



'A. dyari Marlatt. Larva feeds on poplar. 



o 



o 



Pteronidea Rohwer. 

 Key to Species. 



1. Females ^ 



Males 34 



2. Dorsum of body black with pale markings 3 



Dorsum of body pale with black markings 3i 



3. Pectus always black 4 



Pectus usually entirely pale, rarely in part fuscous .^ 20 



4. Stigma narrow, more than three times as long as wide, usu- 



ally straight on lower margin • • • • 5 



Stigma broad, not much more than twice as long as wide, 



rounded on lower margin 7 



