1.
.
.

Terminal spiracles conical, distinctly produced (Fig. 12).  Posterior tarsomeres subequal in length
     
1'.
.
.
.

Terminal spiracles not distinctly produced. Posterior tarsus   with first tarsomere as long as or longer than tarsomeres 2 and 3 combined

.
.
.
2

Figure 12. Lateral view of abdomen of Dasyvalgus mexicanus
showing conical terminal spiracle.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2(1). 
.
.
.

Lateral edges of pronotum not serrate (Fig. 13; setae may  need to be removed to view edge of pronotum).  Female with short, scoop-like pygidial spine (Fig. 19); spine moderately recurved in lateral view (Fig. 20)

 
2'.
.
.
.
.
.

Lateral edges of pronotum serrate (Fig. 14; setae may need to be removed to view edge of pronotum). Female without pygidial spine (Fig. 25) or, if present, female with acuminate pygidial spine (Figs.  21, 23); spine moderately decurved in lateral view (Figs. 22, 24)
..

.
.
.
3
Figures 13-14. Lateral view of head and pronotum in
Valgus californicus and Valgus canaliculatus (respectively) showing nonserrate (13) or serrate (14) pronotal margin.
.
Figures 19-26. Dorsal and lateral views (respectively) of female
pygidium and pygidial spines in: 19-20) Valgus californicus,
21-22) Valgus canaliculatus, 23-24) Valgus hemipterus,
and 25-26) Valgus seticollis.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3(2).
.
.
.
.
.

Body length (as measured from apex of pronotum to apex of pygidium) 4.0-6.0 mm.  Female without pygidial spine (Figs. 25-26) or pygidial spine of female without lateral serrations (Figs. 21-22).  Elytral cuticular color reddish-brown, brown, or castaneous
0
.
.
.
.
4
 
3'.
.
.
.

Body length (as measured from apex of pronotum to apex of pygidium) 8.0-9.0 mm.  Pygidial spine of female with irregular,  lateral serrations (Figs. 23-24).  Elytral cuticular color piceous
Figures 21-26. Dorsal and lateral views (respectively) of female
pygidium and pygidial spines in: 21-22) Valgus canaliculatus,
23-24) Valgus hemipterus, and 25-26) Valgus seticollis.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
4(3).
.
.
.
.

Male with dense patch of overlapping yellow and cream-colored   setae on ventral surface of abdomen.  Female with acuminate pygidial   spine (Fig. 21); spine decurved in lateral view (Fig. 22).  Elytral cuticular color reddish-brown or brown

.
Valgus canaliculatus
(Olivier)
 
4'.
.
.
.
.
.

Male with moderately dense, tawny setae on ventral surface of   abdomen, setae not overlapping and dense.  Female without acuminate pygidial spine (Figs. 25-26).  Elytral cuticular color of male reddish-brown; cuticular color of female castaneous

.
.
Valgus seticollis (Palisot de Beauvois)
Figures 21-22, 25-26. Dorsal and lateral views (respectively) of female
pygidium and pygidial spines in: 21-22) Valgus canaliculatus,
and 25-26) Valgus seticollis.