■312 The Ohio Journal of Science [Vol. XX, No. 8, 



Pangonia translucens Macquart. 



Thorax plain brown, wings uniformly nearly black, legs, antennae, 

 palpi and proboscis very dark colored, nearly black. First two seg- 

 ments of the abdomen above pale, segments three, four and five black, 

 usually with a sparse fringe of white hairs on the posterior margin of 

 each. In some specimens the posterior margins of segments three and 

 following segments are pale. Segment two is marked with an elongate 

 more or less triangular black spot in the middle of the dorsirm. 



Pangonia fusciformis Walker is considered as a synonym. 

 Miss Gertrude Ricardo has redescribed Walker's t^^pe in 

 Annals and Magazine of Natural History, Series 7, Volume V, 

 page 170. 



Seven specimens, all females, from Ecuador, Canal Zone, 

 Panama and Gautemala show sufficient variation to include 

 both translucens and fusciformis. 



Pangonia melanopus n. sp. 



Thorax brown, wing black to the axillary incision, pale yellowish 

 to the tip of the anal vein and nearly to the tip of the first vein near the 

 •costa; from thence to the apex nearly uniform fuscous, first posterior 

 cell closed, second submarginal cell with a long appendage. Legs very 

 ■dark brown, almost black. Abdomen above, first segment wholly dark 

 brown, second segment wholly pale yellow, third, fourth and fifth seg- 

 ments widely dark brown with the lateral margins yellow; abdomen 

 ventrally, pale yellow, darker near the tip. Thorax and abdomen clothed 

 with golden yellow hair. 



Length of the female 17 millimeters. Front nearly twice as wide 

 near the lower corner of the eyes as at the vertex, ocelli prominent, 

 antenna with the first and second segments yellowish gray pollinose and 

 black haired, third segment bright }'ellow, palpi brown. 



Length of the male 1.^ millimeters. Colored like the female except 

 the second abdominal segment has an elongate obscure dark marking 

 at the middle of the dorsum and the brown of the following segments 

 is hardly as well defined. It is doubtful if these differences would be 

 constant in a series of specimens. 



Holotype female and allotype male collected at Villa Union, 

 Sinola, Mexico, Presidio River, by B. P. Clark, in the United 

 States National Museum. A paratype female from Villa 

 Union, Sinaloa, Mexico, Rusche, collector, in my collection. 



This insect is closely related to Pangonia caustica Osten 

 Sacken, which has the thorax clothed with black hair, instead 

 of yellow, the tibia and tarsi rufous instead of black, and the 

 abdomen quite differently colored, besides other differences. 

 Pangonia pavida Williston has much in common with melanopus 

 also. 



