18 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.60. 



PERDITA SEMICAERULEA Cockerell. 



Five females; Sanderson, Texas. May 9, 1912 (J. S. Mitchell). 

 These are identical with the typical insect of New Mexico. 



PERDITA MACROSTOMA, new species. 



Male. — (Type). Length a little over 6 nun.; robust, with extremely 

 broad head, the eyes diverging below ; head and thorax with thin but 

 conspicuous dull white hairs ; head dark blue, the front dull, cheeks 

 shining; cheeks unarmed; clypeus extremely broad and low, with 

 lateral extensions to base of the simple mandibles; clypeus (except a 

 pair of dots), labrum, mandibles (except apically), minute supra- 

 clypeal line and small dog-ear marks, and lateral face marks, all cream 

 color; lateral marks transversely cuneiform, w^ith the apex (mesad) 

 obtuse, and the lower outer angle acute; scape cream color in front, 

 black behind; flagellum clear ferruginous beneath, dark brown above; 

 mesothorax shining dark bluish green, metathorax blue, pleura blue ; 

 no light markings on thorax ; tegulae pale testaceous ; wings perfectly 

 clear, margin of stigma and nervures dilute sepia ; stigma large; mar- 

 ginal cell oblique at end ; legs brown-black, with anterior knees, tibiae 

 and basitarsi in front pale reddish-cream ; anterior tarsi and middle 

 and hind knees more or less pale ; abdomen ferruginous, polished, the 

 apex broadly bilobed ; color of abdomen ferruginous, the first segment 

 brown except apically, the second and third with indistinct, suffused, 

 yellowish bands, and all the segments with suggestions of dusky sub- 

 lateral spots. 



Female. — Length about 7 mm., differing at once from the male in 

 that the abdomen is dark brown, with narroAvly interrupted cream- 

 colored bands on segments 2 to 5, those on 2 and 3 produced down- 

 ward (caudad) at base, becoming pistol-shaped, but not united; head 

 not nearly so broad as in male; mandibles rufo-testaceous, dark at 

 apex; labrum and clypeus reddish -Jjrown, the latter with a plow- 

 shaped cream-colored mark at each side ; no supraclypeal or dog-ear 

 marks, but transverse lateral marks, concave above; scape black; 

 flagellum pale rufo-testaceous beneath. 



Los Angeles County, California, May, four of each sex (Coquil- 

 lett). 



Type.— C^t. No. 24894, U.S.N.M. 



In my key ® the male runs to 7, except for the simple mandibles ; 

 it falls nearest to P. latior Cockerell, which also has the abdomen dif- 

 ferently colored in the sexes, but differs at once by the large stigma. 

 The female runs to P. verbesinae Cockerell, but the head and wings 

 are quite different. There is some resemblance to P. aureoviUoia 

 Cockerell, but that differs greatly in the marking of the abdomen. 



• Proc. Phila. Acad. Nat. Sci., 1S96, p. 45. 



