Pupal cases of Nearctic robber flies (Diptera: Asilidae)
Author
Dennis, D. Steve
Author
Barnes, Jeffrey K.
Author
Knutson, Lloyd
text
Zootaxa
2008
2008-09-03
1868
1
1
98
https://biotaxa.org/Zootaxa/article/view/zootaxa.1868.1.1
journal article
10.11646/zootaxa.1868.1.1
11755334
5133591
Key to known pupal cases of Nearctic species of
Efferia
1 Labral sheath with low apical keel on posterior third or more; proboscial sheath with posterior tubercle.2
Labral sheath with raised, tuberclelike keel on posterior half; proboscial sheath with spinelike posterior process .............................................................................................................
Efferia benedicti
(Bromley)
2 Proboscial sheath with single median tubercle on each side of midline; abdominal segment 8 with 2–3 dorsal posterolateral spurs on each side of midline and 5–8 bristlelike spines below and behind each spiracle...............................................................................................................................................................3
Proboscial sheath with 3–8 minute tubercles on each side of midline; abdominal segment 8 with 01 dorsal spurs on each side of midline and 2–3 bristlelike spines below and behind each spiracle...................4
3 Wing sheath rarely with median tubercle, abdominal segment 1 with 3 bristlelike spines behind each spiracle; abdominal segments 2–4 often with bifurcate dorsal spines; segment 8 with 2 dorsolateral spurs on each side and 6–14 subequal ventral bristlelike spines ..................................
Efferia aestuans
(Linnaeus)
Wing sheath with median tubercle; abdominal segment 1 with 6 bristlelike spines behind each spiracle; abdominal segments 2–4 without bifurcate dorsal spines; segment 8 with 3 dorsal spurs on each side and 16 long and short ventral bristlelike spines ..................................................
Efferia triton
(Osten Sacken)
4 Anterior mesothoracic spines apically rounded; wing sheath without median tubercle; abdominal segment 1 with 14 dorsal spurs; segment 8 with 14 ventral bristlelike spines ....................
Efferia frewingi
Wilcox
Anterior mesothoracic spines distinctly acuminate; wing sheath with median tubercle; abdominal segment 1 with 12 dorsal spurs; segment 8 with 2 ventral bristlelike spines .................
Efferia helenae
(Bromley)