Key to the genera and species of tribe Brachinini from northern Pakistan

1 Mandible with scrobe; pronotum without longitudinal ridges on disc; protibia upper spur present; mesocoxae not widely separated; metacoxae conjunct-separate...................................................................... 2

- Mandible without scrobe; pronotum with two longitudinal ridges on disc; protibia upper spur absent; mesocoxae conjunt-separate; metacoxae widely separated.............................................. Mastax Fischer von Waldheim. ..3

2 Mandibular scrobe multisetose; elytral striae flat not well developed; apical elytral membrane present. Brachinus Weber. ..4

- Mandibular scrobe unisetose; elytral striae carinate; carinae rounded; well defined strongly contrasting with depressions....................................................................... Pheropsophus (Stenaptinus) Maindron. ..6

3 Elytra black with reddish brown dumbbell shaped band along middle suture; two off-white transverse bands which could not touch each other as a result of central dumbbell shape mark....................... Mastax histrio Fischer von Waldheim

- Elytra matt black; humeral band, light brown quarter a circle shaped end as with square shape mark near epiplura; one white mark near side edge of elytra and one other light brown mark near suture before elytral apical band..................................................................................................... Mastax pakistana Jedlička

4 Elytra spotted or variegated color pattern (yellow and black); two subhumeral round marks narrowly extend to the shoulders and a subapical transverse band with three posterior spots merged to form a continuous sinuated band...................

.................................................................................. B. (Aploa) pictus Hope - Elytra uniformly colored with metallic tinge; elytral striae contrasting in color with disc.............................5

5 Antennal segment III subequal to segment I and II combined; elytral apical membrane at apex with a row of long setae (longer than the width of apical membrane).................................. B. (Brachinus) ejaculans Fischer von Waldheim

- Antennal segment III longer than segment I and II combined; elytral apical membrane apex without row of long setae.................................................................... B. (Neobrachinus) pallidipes Reitter, comb. nov.

6 Elytra with humeral marks; elytral epipleura without fine tubercles..............................................7

- Elytral without yellow humeral spot and epipleura with fine tubercles............ P. (Stenaptinus) hilaris sobrinus (Dejean)

7 Frons with black mark................................................................................. 8

- Frons without black mark.............................................................................. 9

8 Head yellowish; frons with black inverted “Y” shaped mark; pronotum black with two longitudinal yellow stripes......................................................................... P. (Stenaptinus) consularis (Schmidt-Goebel)

- Head reddish brown; frons with dark brown longitudinal stripe; pronotum lateral bead black................................................................................................... P. (Stenaptinus) lineifrons Chaudoir

9 Elytral humeral mark longitudinal; median transverse band strongly serrated at edges and ends at 8th stria; elytral epipleuron black................................................................... P. (Stenaptinus) lissoderus Chaudoir

- Elytral humeral mark round; median transverse band round near elytral suture and narrow towards epipleuron where it ends; epipleuron black except where median transverse band touches....................... P. (Stenaptinus) catoirei (Dejean)