Ocyptamus (Orphnabaccha) lanei (Fluke)
Ocyptamus (Orphnabaccha) lanei (Fluke, 1950).
Fluke, C.L.,Jr. (1950) Some new tropical syrphid flies with notes on others. Acta Zoologica Lilloana 9, 439-454.
Ocyptamus (Orphnabaccha) lanei (Fluke, 1950).
Fluke, C.L.,Jr. (1950) Some new tropical syrphid flies with notes on others. Acta Zoologica Lilloana 9, 439-454.
Described originally as Stenosyrphus (Episyrphus) lanei, Thompson et al. (1976) included this species under Ocyptamus.
Synonym:
Stenosyrphus (Episyrphus) lanei Fluke, 1950: 444.
The subgenus Orphnabaccha is distinguished by having the metasternum pilose, anterior anepisternum pilose, facial tubercle well-developed and metaespisternum bare.
Vockeroth (1969) divided Orphnabaccha in three species groups based on abdomen shape and male genitalia. The coreuleus group have black and grey abdomen, black face, darkened costal area and infuscate apical wing. The amplus group has a typical Syrphus-type abdominal pattern and furcate superior lobe of the male genitalia. The caldus group is more variable but members share yellow face with medial black vitta and abdominal yellow markings.
New description:
MALE.
Head: Face with distinct facial tubercle, yellow with medial shiny black vitta, whitw pollinose laterally, yellow pilose; gena yellow except brown vitta on genal suture, yellow pilose, balck pilose laterodorsally; lunule black; frontal triangle yellow with basal broad black area dorsad to antenna, densely whitish-yellow pollinose, black pilose; vertical triangle black, bronze pollinose, black pilose; antenna orangish-brown, basoflagellomere dark on dorsal half; occiput black, white pollinose, yellow pilose.
Thorax: Scutum black densely bronze pollinose, yellow pilose with black pile on posterior fifth; notopleuron yellow pollinose; postalar callus black pilose; scutellum yellow, black pilose, subscutellar fringe complete with long brown pile. Pleuron black, whitish-brown pollinose, posterior anepisternum yellow pollinose on posterior half and katepisternum yellow pollinose dorsally, yellow pilose except anepimeron black pilose; anterior anepisternum pilose; metaepisternum bare; metasternum pilose; calypter yellow; plumula yellow; halter yellow; spiracular fringes yellow. Wing: Wing membrane slightly brownish, stigma darker; entirely microtrichose. Alula broad, microtrichose. Legs: Pro- and mesofemora brown, yellow on apical third; pro- and mesotibia yellow; pro- and mesotarsi brown; metaleg dark brown.
Abdomen: Parallel-sided, slightly oval, unmargined. Dorsum mainly black, black pilose dorsally and laterally except 1st tergum yellow pilose and 2nd tergum yellow pilose on anterior 2/3; 1st tergum black; 2nd tergum black with 2 mesolateral yellow maculae; 3rd and 4th terga black with broad yellow fascia with posterior margin sinuate, not reaching lateral margins; 5th tergum black with two triangular maculae narrowly joined medially, not reaching lateral margins; sterna mainly yellow with medial black macula in each sternum (the one on terga 3 and 4 broader).
FEMALE.
Very similar to male except frons black, yellow pollinose basolaterally, bronze pollinose medially; abdomen more oval.
Neotropical species known from Brazil.