TRIGONALlM. 
181 
To any one who has seen these active insects flying about, the genus 
will for ever be at once distinct. The imago enters houses and other 
buildings in search of cockroaches ( Blattidce ) in whose egg capsules 
the female deposits her eggs and is one of the few flying insects one 
perceives on board ship. The larvae destroy the eggs and one species 
has been very widely distributed over the globe where the household 
cockroaches are to be found. Evania appendigaster, L., is the Europ¬ 
ean species found now in all but the coldest parts of all continents. 
E. antennalis, Westw., is described from Bombay and E. alhitarsis, 
Cam., as well as E. curvicarinata, Cam., are Indian. 
Gasteruption is a genus containing a large part of the species'of the 
family and includes G. orientate , Cam., described from Bengal, and G. 
mandibulare, Cam., of whose habits apparently nothing is on record. It 
is likely to share the habits of the known species, and prove to be a 
parasite on Aculeate Hymenoptera. 
Aulacus bituberculatus appears to be the sole other recorded species. 
Other species are known in Ceylon and it is probable that these with 
others will be found also in India. 
Trigonalid^j. 
Abdomen ovate , five-jointed , not petiolate. Trochanters not fully 
divided . Both wings with a complex venation. 
A small family of insects 
of which little is known. 
Schulz has recently listed 
the species (Genera Insec- 
to rum, 1907), one out of 
forty-two being doubtfully 
Indian. The known spe¬ 
cies are parasites on Ves- 
pidge and hyper parasites 
on Diptera ; no pupal 
cocoon is made. Pseu- 
dogonalos Harmandi , Sell, 
(fig. 97) occurs in Dar¬ 
jeeling, Poecilogonalos 
pulchella, Westd., in 
Fig. 97— PSEUDOGONALOS HARMANDI. 
(From Schulz.) 
