Siman 85
Presented here for study, not as a practical ruling. The Shulchan Aruch rules by Sephardi custom, the Rema's glosses by Ashkenazi custom, and the Kitzur follows Ashkenazi custom. For a practical question, ask your rabbi.
א סִימָנֵי חֲגָבִים; כָּל שֶׁיֵּשׁ לוֹ ד' רַגְלַיִם וד' כְּנָפַיִם, וּכְנָפָיו חוֹפִין אֶת רֹב אֹרֶךְ גּוּפוֹ וְרֹב הֶקֵּפוֹ, וְיֵשׁ לוֹ שְׁנֵי כְּרָעַיִם לְנַתֵּר (פי' לְקַפֵּץ וּלְהַעְתִּיק מִמָּקוֹם לְמָקוֹם) בָּהֶם. וַאֲפִלּוּ אֵין לוֹ עַכְשָׁו, וְעָתִיד לְגַדְּלָם לְאַחַר זְמַן. וְאַף עַל פִּי שֶׁיֵּשׁ בּוֹ כָּל הַסִימָנִים הַלָּלוּ, אֵינוֹ מֻתָּר, אֶלָּא אִם כֵּן שְׁמוֹ חָגָב אוֹ שֶׁיֵּשׁ לָהֶם מָסֹרֶת שֶׁשְּׁמוֹ חָגָב.
1 Kosher signs for locusts: All that have 4 legs and 4 wings, and its wings cover most of the length and circumference, and has two legs to jump with, even if it doesn't have now, but is destined to grown them after a time. And even if it has all these signs, it is not permitted unless its name is "chagav", or they have a tradition that its name is "chagav."
ב חֲגָבִים, אֵינָם טְעוּנִים שְׁחִיטָה.
2 Locusts do not require slaughter.
ג צִיר חֲגָבִים טְמֵאִים, מֻתָּר.
3 Oil of non-kosher locusts is permitted.