ODONATA OF BAJA CALIFORNIA. 517 



Croceipennis is said to be smaller, but to have a longer 

 pterostigma; measurements are not given. The expres- 

 sion used by Dr. Hagen for saturata, " hamules with in- 

 ner and outer branches equally pointed," is misleading, 

 as the inner branch in both forms is always longer and 

 more acute; in otherwise typical croceifennis the inner 

 branch is more slender and its extreme hook-like apex 

 is somewhat more prolonged than in otherwise typical 

 saturata^ but after an examination of the above mate- 

 rial, it seems impossible to establish any specific differ- 

 ence. The difference in the size of the genital lobe is 

 mainly in wddth; in males with typical saturata wings the 

 greatest width is less than the length ; in typical crocei- 

 pennis the width exceeds the length. 



The specimens from San Ignacio agree mainly with 

 saturata in wing-coloring, but the intensity of the color- 

 ing of the median space and triangle of the hind wings 

 varies; the genital lobe is Yi^q saturata. Abd. 6 32-33, 

 ? 30-32. Hind wing ,^ 38-40, ? 40-42. 



The fourteen males from San Jose del Cabo (not dated 

 and September, 1893) mostly agree with croceifennis. 

 The yellowdsh- brown on the front wings extends from 

 the base to the triangle or to the nodus, on the hind 

 wings its apical limit varies from the triangle to beyond 

 the nodus. In one male the median space in the hind 

 wings is fuscous, but not the triangle ; this male has the 

 genital lobe narrower than its fellows. The amount of 

 coloring of the wings is not correlated with size. Abd. 

 29-32.5, hind wing 35-41. Pter. 5.5-5. 



Of the thirty-five individuals taken at San Jose del 

 Cabo in October, 1893, twenty-five, all males, have the 

 wings reddish-brown from base to nodus for almost the 

 entire width of the wing; of these twenty-five, some have 

 no fuscous in the triangle and median space, others a 



