February 21, 2019

Key to Dicranus

Adapted from Carrera, 1955. Carrera did not have access to specimens of D. jaliscoensis, so this key will need to be modified/updated.

1a Mystax yellow; legs entirely yellow or with black spots……2
1b Mystax and legs entirely black………….nigerrimus
2a Black bristles and hairs on the lateral margins of the mesonotum; abdominal tergites 2-4 with grey pollen on the sides of the posterior margins; the last three tarsal joints black…..3
2b Yellow bristles and hairs on the lateral margins of the mesonotum; abdominal tergites 2-4 with
thick yellow pilosity on the sides of the posterior margins ; all tarsi yellow……rutilus
3a Anterior tibiae yellow with an elongated black spot on the ventral surface ; black bristles and hairs on the ocelar callus and occiput ( at least in schrottkyi)……….4
3b Anterior tibiae wholly yellow; yellow bristles and hairs on the ocelar callus and occiput….tucma
4a Antennae black; scutellum witli grey pollen on the dorsum………schrottkyi
4b Antennae and scutellum yellow…..jaliscoensis

Posted on February 21, 2019 14:02 by myelaphus myelaphus | 0 comments | Leave a comment

September 24, 2018

Key to the Subfamilies of Asilidae [WIP - North America only ATM]

1a. Abdomen remarkably long and slender; pulvilli and alula absent............................Leptogastrinae
1b. Abdomen typically shorter and more robust; pulvilli and alula usually present............................2
2a. Eyes large, goggle-like.......................................................................................................Trigonomiminae
2b. Eyes not so.......................................................................................................................................................3
3a. Wing cell r1 stalked or closed at wing margin...................................………............................................4
3b. Wing cell r1 open............................................................................................................................................6
4a. Antennae typically cylindrical throughout; often mimics of Hymenoptera...................Laphriinae
4b. Antennae with a thin, tapering element; typically grey, elongate flies.............................................5
5a. Antennae plumose....................................................................................................................Ommatiinae
5b. Antennae not plumose.....................................................................................................................Asilinae
6a. Vertex conspicuously expanded....................................................................................Stichopogoninae
6b. Vertex not so (except Willistonina)...........................................................................................................7
7a. Acanthophorite spines always absent; tibial spur always absent; dense fringe of setae on hind
femur and tibia; antennae situated on tubercle……....................................................................Dioctriinae
7b. Acanthophorite spines generally present; tibial spur present or absent; dense fringe of setae
on hind femur and tibia absent; antennal tubercle present or absent…………………………………………...8
8a. Legs with flattened setae....................................................................................................Willistonininae
8b. Legs without flattened setae........................................................................................................................9
9a. Large, curved spur present on fore tibia (except Archilestris).................................Dasypogoninae
9b. Tibial spur absent, or if present, thin and sigmoid................................................................................10
10a. Typically large, elongate flies; tibial spur always absent..........................................Stenopogoninae
10b. Generally small, compact flies; thin, sigmoid tibial spur present or absent.....Brachyrhopalinae

Posted on September 24, 2018 20:50 by myelaphus myelaphus | 2 comments | Leave a comment

July 14, 2018

Key to the Mallophora of the United States

1. Abdomen entirely black......................................................................................................................2
Abdomen entirely yellow or some combination of yellow and black......................................3

2. Hairs of scutellum black, beard yellow................................................................Mallophora atra
https://www.inaturalist.org/observations/16615108
Hairs of scutellum yellow, beard black........................................................Mallophora leschnaulti
https://www.inaturalist.org/observations/8198405

3. Abdomen entirely yellow....................................................................................Mallophora fautrix
https://www.inaturalist.org/observations/1826585
Abdomen black and yellow................................................................................................................4

4. Abdomen mostly yellow but with black tip...................................................Mallophora orcina
https://www.inaturalist.org/observations/811603
Abdomen mostly yellow but with black middle...................................Mallophora bomboides
https://www.inaturalist.org/observations/8508244

Posted on July 14, 2018 16:27 by myelaphus myelaphus | 9 comments | Leave a comment

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