94 (4) Pronotum on each side with a conspicuous, complete 

 sublateral longitudinal sulcus; pubescent; brown; 

 about 4.5 mm long, 1.75 mm wide (Fig. 90) : Dry ops arizonensis 

 Pronotum without such a sublateral sulcus 95 



Figs 90-91 Dorsal view of adult: 

 91- Pelonomus obsourus. 



90- Dryops arizonensis; 



95 (4) Second segment of antenna not enlarged; antennae 



pubescent, as are head and body; bases of antennae 

 very close together; both third and fourth segments 

 of maxillary palp very elongate; without tomentum; 

 reddish to dark brown; 4.8-6.5 mm long, 2-2.5 mm 

 wide (Fig. 91) : Pelonomus obsourus 



First, and, even more, second segment of antenna 



enlarged and heavily sclerotized, forming a shield 

 beneath which remaining segments may be retracted and 

 protected; bases of antennae widely separated; parts 



of body and legs with tomentum (Fig. 92) Heliohus 



[This section of the key is largely based upon 



Musgrave (1935) .] 96 



96 (95) Pubescence of last abdominal sternite different from 



that of preceding stemites, the last sternite often 



appearing bare 99 



All abdominal sternites similarly and densely 



pubescent (tomentose) 97 



97 (96) Male genitalia (Figs 93, 94) flattened dorsoventrally; in 



lateral aspect paramere not enlarged apically; in dorsal 

 aspect penis acutely pointed at apex; female genitalia 

 (Fig. 95) relatively streamlined; black; 5.2-7.25 mm 

 long, 2.15-3 mm wide: Heliohus oonfluentus 

 Male genitalia not flattened; paramere enlarged at apex; 

 penis not acutely pointed; female genitalia with tip of 

 ovipositor (hemistemite) turned up more abruptly 98 



46 



