PROC. ENT. SOC. WASH., VOL. 22, NO. J, OCT., IQ2O 191 



A NEW TRIGONALID FROM INDIA (HYM). 

 BY T. D. A. COCKERELL. 



Some time ago Mr. Ramakrishna Ayyar sent me from India 

 an insect which I took at first sight to be a bee of the genus Xomada. 

 Closer inspection showed that the resemblance was wholly super- 

 ficial, and I had before me a member of the Trigonalidae. I was 

 not then able to do more than ascertain that it was at least closely 

 allied to Poecilogonalos thwaitesii (Westwood), described from 

 Ceylon. Coming to Washington, with the assistance of Mr. 

 S. A. Rohwer and some additional literature, I have been able 

 to separate it from all known forms, and it is accordingly de- 

 scribed. 



Poecilogonalos mimus, new species. 



Female. -Length about 9 mm.; anterior wing 7.5 mm.; similar in general 

 character and appearance to P. thwaitesii, but ground color of head and thorax 

 mainly black, clypeus only very shallowly and broadly subemarginate, no 

 median frontal spot, scutellum yellow with a median ferruginous band (axillae 

 red), and second abdominal segment with the yellow confined to the broad 

 apical band. The insect actually falls nearer to P. formosana Bischoff from 

 Formosa, apparently agreeing in the rather coarse sculpture of the head and 

 thorax, and in the clypeus being without a triangular emargination, as well 

 as in the lack of the basal yellow spot on second abdominal segment. It 

 differs, however, in the coloration of the scutellum, and in the dark cloud on 

 the wings being confined to the apical half of the marginal cell (extending 

 on the lower part as far as middle of third submarginal) and a broad aiea 

 below the marginal beyond the third submarginal. The second submarginal 

 cell is considerably longer than in Westwood's figure of P. thwaitesii, and 

 the first recurrent nervure meets the first transversocubital, a trifle toward 

 the outer side. 



Head transverse, the broad mandibles yellow, with four black teeth; clypeus 

 with two large subcircular yellow spots, separated by a reddish band; an- 

 terior and posterior orbits with broad yellow bands, the anterior one ending 

 abruptly (broadly truncate) at about the beginning of the upper two-fifths 

 of orbit; a pair of subtriangular yellow spots low down on front; scape swollen, 

 ferruginous; flagellum long and slender, blackened above, below red with the 

 sutures narrowly black; front with thin white hair; vertex closely punctured 

 but shining; the posterior yellow band of cheeks, failing on occiput, emits 

 two ferruginous bands which converge to top of eye, enclosing a black triangle, 

 and below this is another black triangle behind the eye; thorax above rather 

 coarsely punctured, the scutellum rugosopunctate and dull ; sides and hind 

 part of mesothorax ferruginous; the two wedge-shaped anterior yellow marks 

 on mesothorax as in P. thwaitesii; postscutellum yellow with an oblique 

 black band dividing the yellow on each side; lower part of metathorax broadly 



