24 CYRTIDAE OF NORTH AMERICA 



the wings reach a Httle beyond the tip of the abdomen. The 

 venation varies somewhat in different species but the general type 

 is the same. 



According to Erichson this genus comes near Astomella, the re- 

 semblance being like that of Lasia and Panops. The species 

 are of good size for this family. 



Synopsis of Species 



1. Species without black markings micans Erichson 



Marked with black on the abdomen 2 



2. A.11 longitudinal veins reach the wing margin 4 



Some of the longitudinal veins do not reach the margin 3 



3. First posterior cell closed; lateral margins of abdominal segments yellow. 



helluo O. S. 

 First posterior cell open; lateral margins of abdominal segments black. 



coerulea new species 



4. Thorax and scutellum black schwarzi new species 



Thorax and scutellum largely yellow; third antennal joint club-shaped. 



loewi new species 

 Ocnaea micans 

 Ocnaea micans Erichson, Entomographien, p. 155, (1840) 



(Transl.) "Fuscous, thorax shining and with ashy hair, second and third 

 segments of abdomen testaceous. Length 4§ lines. 



"Antennae black, the base testaceous, third joint elongate, linear, before 

 apex enlarged, apex pointed (third joint club-shaped). Head black, black 

 pilose, hypostoma acuminate. Thorax fuscous, dorsal prothoracic lobes and 

 mesothoracic callosities before scutellum testaceous, clothed with thin ashy 

 hair, silky, shining. Abdomen thinly gold pubescent, fuscous, below concolor- 

 ous, above the second and third segments testaceous, small triangular basal 

 spots are fuscous, apex of fourth and fifth margined testaceous. Legs fuscous, 

 base of femora, knees and tarsi testaceous. Wings yellowish hyaUne, two 

 submarginal cells, five posterior, three discoidal. Squamae hyaline, mar- 

 gined brown. Halteres blackish." 



Habitat. — Mexico. Collected by Deppe. 



Ocnaea helluo 



Ocnaea helluo O. S., Western Dipt., p. 278, (1876). 



"Two submarginal cells; five posterior cells, the first divided in two by a 

 cross-vein, and the second half of it closed and petiolate; all the longitudinal 

 veins reach the margin; body black, beset with short yellowish pile; hind 

 margins of the abdominal segments with broad yellow borders, expanding 

 along the lateral margins; legs yellow, including the coxae. Length 13-14 nun. 



"The venation is like that of 0. calida Wi('d(>inann'i with the following modi- 

 fications: 1. The third vein emits a branch some distance beyond the cross- 



< Auss. Zweifi., ii, tab. VII, f. 2b. 



