lO E. B. WiLUAMSON 



dage or not that far ; external branch of the hamules directed ventro-caudad, 

 extending ventrad about as far as or farther than the genital lobes. Female 

 lamina in antero-ventral view, if triangular, swollen at base on either side, in 

 lateral view the posterior basal lobe distinct; apex of sternum of segment 9 

 with a patch of bristles (except peruviana) 7. 



6 (s). Lateral and ventral carinas on segment 4 separated by a distance about one- 



fifth the length of the lateral carina simplicicolUs. 



6'. Lateral and ventral carinas on segment 4 separated by a distance about one- 

 third the length of the lateral carina collocata. 



7 (5'). Dark basal area on hind wings reduced, not reaching the cubito-anal crossvein. 



Thorax distinctly patterned with a median rectangular pale area above, bor- 

 dered on either side with black, to entirely black in old males which have 

 abdominal segments 4-10 bright red. Lateral and ventral carinas on segment 

 4 separated by a distance about equal to one-third the length of the lateral 

 carina. Male with the external branch of the hamules and the genital lobes 

 reaching ventrad to about the same level, or the genital lobes very slightly 

 longer; apical ventral teeth on the superior appendages about the level of the 

 distal end of the inferior appendage. Female lamina in antero-ventral view 

 semicircular, length from base of basal lobe to apex about .65 mm. ; apex of 

 sternum of segment 9 with a single row of bristles peruviana. 



7'. Dark basal area on hind wings reaching beyond the cubito-anal crossvein. 

 Thorax not patterned with a median rectangular pale area bordered on either 

 side with black. Lateral and ventral carinas on segment 4 separated by a dis- 

 tance less than one-third the length of the lateral carina. Male with the exter- 

 nal branch of the hamules reaching ventrad distinctly beyond the level of the 

 genital lobes. Female lamina in antero-ventral view not semicircular, length 

 from base of basal lobe to apex about 1.2 mm.; apex of sternum of 9 with a 

 patch of bristles 8. 



8(7')- Thorax largely dark or black, intricately patterned with paler, to completely 

 black in old males. Abdomen black in old males, in others largely dark with 

 conspicuous large basal or subbasal pale (yellow) areas, only narrowly sepa- 

 rated by black in the median line, on segments 4 and 7. Dark colored to black 

 insects. Lateral and ventral carinas on segment 4 separated by a distance equal to 

 or less than one-fourth the length of the lateral carina. Male with the apex 

 of the inferior appendage reaching beyond the level of the ventral teeth on the 

 superior appendage. Female lamina in antero-ventral view nearly as long as 

 wide, rounded triangular, slightly swollen at base on either side attala. 



8'. Thorax pale yellowish or greenish to dark red, without dark markings. Abdo- 

 men largely pale, yellowish to bright red. Pale colored to red insects. Lateral 

 and ventral carinas on segment 4 separated by a distance equal to between 

 one-third and one-fourth the length of the lateral carina. Male with the ven- 

 tral teeth on the superior appendages extending posteriorly to about the same 

 level as the apex of the inferior appendage. Female lamina in antero-ventral 

 view trilobed, the width about one-half greater than the length mithroides. 



Erythemis carmelita, new species 

 Plate I, figs. 1-6 



Abdomen, inale 31-31. 5, female 32-33; hind wing, male 34.5-35. female 

 35; stigma, male 3-3.2, female 3.4-3.6. 



Male. — Rear of head brownish red or yellow, labium yellow, darkening 

 to red anteriorly and mesially, labrum orange, clypeus, frons, vesicle and 

 occiput red, the last and the anteclypeus duller. 



