Megastigmus

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figures 1-5. Megastigmus kashmiricus sp. nov. (Female)

1 - antenna; 2 - forewing venation ; 3 - Head and pronotum dorsal view; 4 - Propodeum dorsal view;

5 - gaster (without ovipositor) dorsal view; 6 - Megastigmus sp. (Male) forewing venation.

 

 

 

Female                                                             Male

 

Image 1. Megastigmus kashmiricus sp.nov.

 

 

Key to the oriental species of Megastigmus Dalman females

(Modified from Narendran et al. 2003)

 

1.         F1 distinctly longer than combined length of pedicel  and ring segment ..…...............................................................2

--          F1 shorter than (or at the most equal to) combined length of pedicel and ring segment ……....…………………….3

2.         Length of ovipositor 1.25x combined length of thorax and gaster; body yellow. Philippines ….................………                           .........................................................................................................………...………...M. immaculatus Ashmead

--          Length of ovipositor 1.09x combined length of thorax and gaster; body yellow with dark tinge or patches on                 

            some parts of thorax and gaster. Host: Fruits of Dalbergia sericea. Indonesia: Java........M. leeuweni Ferriere

3.         Thorax dorsally metallic green; F1 equal to pedicel and ring segment combined. Host: parasitic on cynipidae on                      

            Quercus: Europe; India: Uttar Pradesh. ..............……………………….....……………..…M. dorsalis (Fabricius)

--          Thorax dorsally yellowish brown; F1 shorter than pedicel and ring segment combined……..……………….....……4

4.         Ring segment of antenna about half as long as pedicel; forewing with stigmal lobe narrow and elongate, basal                        

            vein weakly distinct. Host: seeds of Cupressus torulosa. India: Himachal Pradesh...........M. cupressi Mathur

--          Ring segment distinctly shorter than half of pedicel; forewing with stigmal lobe not as above, mostly oval or                                    

            semicircular; basal vein clearly distinct.......................................................................................................................5

5.         Ovipositor more than 2x longer than gaster............................................................................................................6

--          Ovipositor 1.3 -1.5x as long as gaster ….......................................................................................…………………..7

6          Frenum nearly smooth; lower clypeal margin not distinctly bilobed or incised at middle; ovipositor 2.2x as long as                   

            gaster; F1 longer than F2; MV about  2.5x as long as STV; POL nearly twice OOL. Host: bud galls of Calycopterys

            floribunda India: Kerala ........................................................……………….M. viggianii Narendran & Sureshan

--          Frenum longitudinally rugose; lower clypeal margin incised in the middle; ovipositor 2.7x as long as gaster; F1                   

            shorter than F2; MV about 3x as long as STV; POL 2.3x OOL; Hosts: Psychid (Pteroma sp.) from Rhizopora                      

            mucronata and parastic on borers of Sonneratia seeds. India: Karnataka............M. karnatakensis Narendran

6.         POL as long as OOL; SMV about 7x MV; STV about  as long as MV; antennal club about 1.7x preceding                                   

            segment., scape 3.75x pedicel . Host: Pods of Albizzia. India: Delhi ...…………….…………M. albizziae Mukerji

--          POL 2.3x OOL; SMV little longer than double MV; STV about half  as long as MV ; club 2.2x as long as preceding                   

segment,scape 2.6x pedicel. Host: Associated  with wild rose Rosa webbiana. India:  Jammu & Kashmir..........            

..........................................................................................................................................M. kashmiricus sp.nov.