XXXV. RECORDS OF T R I G O N A ly I D A B 

 FROM SOUTH INDIA. 



By T. V. Ramakrishna Ayyar, First Assf. to the Government 

 Entomologist, Madras. 



The Trigonalidae form a very small family of parasitic Hy- 

 menoptera and very little is on record regarding these interesting 

 insects. As far as is known of the few European and American 

 forms, the members of the family appear to be parasites or hyper- 

 parasites on species of Vespidae. So far as I know there is only 

 a solitary example of this group of insects that has till now 

 been recorded from the Indian Continent, and that is Pseudogonalos 

 harmandi, Schulz, collected in Darjiling before igo/. In the Genera 

 Insectorum volume on this family the author Schulz records three 

 others from Burma and none from any part of India except the 

 one noted at Darjiling. As such the following records might be 

 of some interest. 



In 1917 two undoubted specimens of this family were collect- 

 ed from South India. But their presence as representatives of 

 this rare group was found out only when I was recently sorting 

 out our Hymenoptera collection. These two forms have certain 

 general resemblances to the Burmese species described by West- 

 wood in the Transactions of the Entomological Soceity for 1868, 

 p. 327, under the name of Poecilogonalos {Trigonalys) pidchella, but 

 both are different in certain features and as such are, I believe 

 new forms. Their general features are as below : — 



I. Poecilogonalos fulvoscutellata, n. sp. 



Head large, subquadrate, distinctly broader than thorax, ver- 

 tex and frontal region closely punctured. Eyes large and situated 

 sufficiently apart from each other. Antennae long and filiform. 

 Ocelli clear ; clypeus slightly emarginate ; mandibles large and each 

 provided with three well-developed teeth. 



Prothorax large, broader than long ; punctured in the same way 

 as head. The anterior lateral region is drawn out into a flattened 

 raised structure in front of the wing tegulae. Scutellum promin- 

 ent, more or less spherical and gibbous. Median segment con- 

 vex with the punctures at the basal region running into fine longi- 

 tudinal striae ; there is a short tubercle at each lateral angle of the 

 base of the metanotum. Legs well developed ; two spurs on the 

 hind tibiae. 



The abdomen is ovoid in shape. The first segment is small and 

 triangular, the second largest, the posterior segments smaller and 



