120 Annals Entomological Society of America [Vol. XV, 



2. Chiromyza vittata fuscana Wied. 



Numerous specimens of both sexes, some in copula, from 

 Puerta Bertoni, Alto Parania, Paraguay, June, 1919, collected by 

 Mr. C. Schrottky. One male specimen from S. Sebastiao, Brazil, by 

 A. A. Barbiellini. 



These specimens agree in having the middle dark stripe of thorax 

 undivided, and usually prolonged behind to the scutellum; the back 

 of mesonotum is broadly infuscated; the dark spots of the pleurae are 

 less developed; the scutellar depressions as in the preceding. 



The venation is as in vittata; the rudiment of M 3 is present in 11 

 specimens of 12. There are frequently abnormal cross-veins in the 

 base of the second posterior cell, forming 1-4 small supernumerary cells; 

 they are present in all the female specimens, but are not symmetrically 

 placed, being often present on one wing only. 



3. Chiromyza vittata ochracea Wied. 



(? transequa Walk.) 



This is the palest of all the forms, with unspotted pleuras and 

 bright orange abdomen. 



One male specimen from S. Paulo, Brazil, March, 1906 (R. von 

 Ihering). Agreeing in venation with the preceding forms; there is no 

 rudiment of M 3. 



4. Chiromyza vittata viridis n. var. 



Two males from S. Paulo, Brazil (A. A. Barbiellini). They seem to 

 agree with ochracea Schiner in being more slender than the preceding 

 forms. 



Male, length of body, 8-9 mm. ; of wing, 8-9 mm. 



Eyes closely approximated, but a very small stripe of the frons is 

 visible between them. Third antennal joint twice as long as the two 

 first joints together, black, pilose, distinctly annulated. 



Thorax reddish on the back, with three less marked dark longitu- 

 dinal stripes; pleurae pale yellowish, unspotted; the sides of the back 

 posteriorly and the border of the scutellum are distinctly greenish. 

 Halteres pale yellow as in all the preceding forms. Abdomen entirely 

 orange, more pale on the venter. Cox£e and legs entirely pale yellowish, 

 with last tarsal joint blackened; trochanters greenish. Wings yellowish, 

 hyaline. One of the two specimens has the discoidal cell complete; in 

 the other only a stump of the hind cross vein is present inferiorly, the 

 cell being broadly open. Both specimens have the second posterior cell 

 acute at base and there provided with a short stalk, which forms a 

 common basal stem for Mj and M2; the discoidal cell is acute out- 

 wardly; there is no rudiment of M3; the terminal stalk of the anal cell 

 is short as usual. The present species shows that the condition of 

 Lagarinus is a casual one; but Enderlein's species has the third antennal 

 joint not annulated. 



