422 
ZOOLOGICAL LITERATURE. 
scribed, namely : — a new genus, AnacrahrOj with 1 new species; and the genus 
CrahrOf divided into 9 groups (distinguished by letters A-I), and including 
40 species, 20 described as new (all tabulated pp. 71-74), and the following 
known species described in detail: — C. interruptm cf ? (St. Farg.), p. 74 ; 
C. 10-maculatus $ (Say), p. 79 ; C. chrysarginus ? (St. Farg.), p. 82 ; C, 
singularis <S $(Sm.), p. 86; C. sex-maculatus <5* $ (Say), p. 91; C.trifasciatus 
(S 2 (Say), p. 93; C. obscurus $ (Sm.), p. 99; and C. scahei' $ (Sm.),p. 113. 
Morawitz (Bull. Acad. St. Petersb. ix. pp. 243-255) discusses 
the value of the groups into which the species of the great 
genus Crabro have been divided^ two of which (lAndenius and 
Crabro) he admitted to generic rank in his paper on the Cra- 
bronidse of the environs of St. Petersburg. He now argues 
that the characters upon which the supposed genera of Cr«- 
brones have been founded are evaneseent, and that, although we 
may select a certain number which, when placed side by side, 
appear to be abundantly distinct, the examination of a larger 
number shows transitions from one form to the other, which 
materially diminish the value of those characters by which the 
separation of the groups seemed to be justified. Accordingly 
he proposes to leave all the Crabrones in one great genus, which* 
he divides into 2 primary and 17 secondary groups, as shown in 
the following abridgment of his tabular synopsis : — 
I. Lindenius (St. Farg.). Mandibles simple at apex. 
A. Mandibles with tlie apex gradually diminished, rounded. 
1. Antennary pits further from each other than from the hairy eyes. 
1. Entomognathus (Dahlb.). 
2. Antennary pits not further from each other than from the eyes. 
2. Chalcolamprus (W esm.); 
3. Lindenius (Wesm.). 
B. Mandibles cut off obliquely at the apex within. 
, . 4, Trachelosimus (Mor.). 
II. Crabro (Fab.). Mandibles tri^ncated at apex, and divided into 2 
approximated teeth. 
A. Eyes scarcely convergent towards vertex; labial and maxillary palpi 
differing by 3 joints 5. Tracheliodes (Mor.). 
B. Eyes strongly convergent towards vertex ; labial and maxillary palpi 
differing by 2 joints (= Crabro, Lat.). 
1. Maxillary palpi 6-jointed, labial 3-jointed. 
6. Physoscelis (St. Farg.) ; 
7. Cory nopus (St. Farg.). 
2. Maxillaiy palpi 6-jointed, labial 4-jointed. 
a. Thorax shining, metanotum faintly sculptured, cordiform area 
generally distinct. 
a. First abdominal segment with a median triangular impression 
at base (= Crossocems, Wesm.) . . 8. Blepharipus (St. Farg.); 
9. Crossocerus (St. Farg.). 
/3. First abdominal segment elongated, with a shaip longitudinal 
keel on each side towards the base 10. Cuphopierus (Mor.) = 
Blepharipus (Wesm.). 
