Sept., i9i6.] Ackerman: Carpenter-Bees of U. S. 219 



The males of texana and virginica resemble each almost as closely 

 as do the females. The following differences, however, serve to 

 separate the two species. The predominant color of texana is green, 

 while that of virginica is black; texana has but little or no yellow 

 coloring on the lateral downward projections of the frons between 

 the clypeus and eyes, while in virginica these areas are entirely yel- 

 low; the pilosity in texana is yellowish white on the cheeks, vertex, 

 face, and on the hind margins of the fourth and fifth abdominal seg- 

 ments, while the corresponding pilosity of virginica is black. I have 

 studied the genitalia of texana and virginica and th^re is no doubt 

 in my mind that they are different species. 



In his Insect Book Dr. L. O. HcTward gives a photograph of 

 texana, male, on plate II, fig. 2y. This was taken of a specimen 

 present in the collection of the U. S. N. M., which is labeled " Type 

 No. 1792," " From Dept. Agri." 



Xylocopa tabaniformis Smith. 



Xylocopa tabaniformis Smith, Cat. Hymen. Brit. Mus., II, p. 362, n. 95 J, 1854. 



Xylocopa tabaniformis var. chiriquiensis, Perez, Act. Soc. Bordeaux, LVI, p. 



120, 5> (j*. ii- ■\'-. 1901. 

 Xylocopa tabaniformis Maidl, Ann. Nat. Hist. Hof.-Mus. Wien, p. 317, 5. <^< 



igi2. 



Length of female and male 17-18 mm. 



Female. — Head black, hairs black, mixed with grayish-white on 

 cheeks, hind part of vertex and face ; punctation rather close and 

 fine ; mandibles with three teeth, two large ones at the apex, and one 

 rounded small tooth on the upper margin, no depression at the base, 

 upper longitudinal groove deep; labrum apparently of one small sub- 

 triangular lobe, but in addition one small lobe on either side hidden 

 beneath ; clypeus flat, punctures close and circular, longitudinal carina 

 or ridge obsolete, impunctate area along lower margin not concave, 

 upper margin straight ; lateral foveolse and frontal grooves deep and 

 prominent; frontal shield flat in the middle, sides sloping gently; 

 frontal carina small and pointed, the upper margin interrupted in the 

 middle by a small pit ; ocelli triangularly placed, the posterior ones 

 with a circular pit behind each and not carinated in front ; antennae 

 black ; eyes small and rather far apart ; vertex and cheeks well punc- 

 tured, the whitish hairs short. 



Thorax black, disk shining; hairs everywhere black, mixed with 



